Stephanie's doctor reduces the dosage of her daily medication when she begins trying to get pregnant. The principle behind this action states that

A. Identity foreclosure: Foreclosure is commitment without prior crisis/exploration, so it does not fit someone who has undergone a crisis.
B. Identity diffusion: Diffusion is marked by neither crisis nor commitment, so it contradicts the description.
C. Identity achievement: Identity achievement is reached after a period of crisis/exploration followed by making a committed choice; this matches “undergone a crisis and made a commitment.”
D. Identity moratorium: Moratorium indicates active exploration/crisis without having yet made a commitment, so it does not fit someone who has already made a commitment.

A. early adulthood, adolescence, middle adulthood, late adulthood: This order is out of sequence (adolescence precedes early adulthood).
B. infancy, prenatal period, early childhood, middle and late childhood: The prenatal period should come before infancy, so this order is incorrect.
C. adolescence, early childhood, middle and late childhood, early adulthood: This sequence is scrambled (early childhood and adolescence are swapped).
D. prenatal period, infancy, early childhood, middle and late childhood: This lists developmental periods in correct chronological order from conception through middle/late childhood.