Which of the following factors can have a positive influence on an individual's self-concept?

Choice A reason: This is not the statement that the nurse should prioritize. The adolescent may be experiencing a crush or a rejection, which are common and normal feelings for their age. The nurse should listen and empathize with the adolescent, but also reassure them that there are other people who like and care for them, and that their self-worth is not dependent on one person's opinion.

Choice B reason: This is the statement that the nurse should prioritize. The adolescent may be suffering from an eating disorder or a body image disturbance, which are serious and potentially life-threatening conditions. The nurse should assess the adolescent's weight, height, vital signs, and nutritional intake, and refer them to a specialist if needed. The nurse should also educate the adolescent on the dangers of skipping meals, the benefits of a balanced diet, and the importance of self-acceptance and self-esteem.

Choice C reason: This is not the statement that the nurse should prioritize. The adolescent may be facing a peer pressure or a bullying situation, which are common and challenging issues for their age. The nurse should support and encourage the adolescent to pursue their interests and hobbies, and to stand up for themselves and others. The nurse should also help the adolescent to develop coping skills, such as assertiveness, problem-solving, and stress management.

Choice D reason: This is not the statement that the nurse should prioritize. The adolescent may be experiencing a role conflict or a career dilemma, which are common and normal dilemmas for their age. The nurse should respect and acknowledge the adolescent's preferences and aspirations, and help them to explore their options and potentials. The nurse should also facilitate a communication and understanding between the adolescent and their parent, and help them to reach a compromise or a solution.

Choice A reason: This is not the most critical stage for developing a healthy self-concept. Infancy is the stage of life from birth to 18 months, where the main psychosocial task is to develop trust versus mistrust. The infant's self-concept is not fully formed yet, but depends on the quality of the caregiver-infant relationship.

Choice B reason: This is the best answer. Adolescence is the stage of life from 12 to 18 years, where the main psychosocial task is to develop identity versus role confusion. The adolescent's self-concept is challenged by physical, cognitive, emotional, and social changes. The adolescent needs to explore and integrate different aspects of their self, such as their values, beliefs, goals, and roles. A healthy self-concept will help the adolescent to achieve a sense of identity, autonomy, and competence.

Choice C reason: This is not the most critical stage for developing a healthy self-concept. Middle adulthood is the stage of life from 40 to 65 years, where the main psychosocial task is to develop generativity versus stagnation. The middle adult's self-concept is influenced by their achievements, responsibilities, and relationships. The middle adult needs to find meaning and purpose in their life by contributing to society and the next generation. A healthy self-concept will help the middle adult to cope with the challenges of aging, work, and family.

Choice D reason: This is not the most critical stage for developing a healthy self-concept. Late adulthood is the stage of life from 65 years and older, where the main psychosocial task is to develop integrity versus despair. The late adult's self-concept is based on their life review and evaluation. The late adult needs to accept their past and present, and face their mortality. A healthy self-concept will help the late adult to achieve a sense of wisdom, dignity, and satisfaction.