Assessment findings consistent with dysmenorrhea might include:

Rationale:
A. By age 2, most children are typically able to perform gross motor skills such as kicking a ball.
B. Inability to kick a ball at this age may suggest a gross motor developmental delay. This finding warrants further assessment of overall motor development and may indicate the need for early intervention services.
C. While motor delays can be associated with autism, inability to kick a ball alone is not a specific sign of autism spectrum disorder.
D. Vision problems may affect coordination, but gross motor delays like difficulty kicking are more directly linked to neuromuscular or developmental issues.

Rationale:
A. The appearance of downy pubic hair occurs after the initial signs of puberty and typically represents Tanner stage 2–3 development.
B. Enlargement and lengthening of the penis usually occur after testicular enlargement, often a few months later, as puberty progresses.
C. Axillary and facial hair develop in later stages of puberty and are not initial indicators of sexual maturation in males.
D. Enlargement of the testicles and scrotum is the first and most reliable sign of puberty in males, generally occurring between ages 9 and 14. Testicular growth reflects activation of the hypothalamic-pituitary-gonadal axis, leading to increased testosterone production and the subsequent development of secondary sexual characteristics. Monitoring testicular size is therefore a key component in assessing the onset and progression of male puberty.