A Woman Never Thought of Herself as Heroic Until She

A woman never thought of herself as heroic until she went through seventy-two hours of labour before giving birth and then nursed her baby right after delivery.This illustrates that

A) others must tell us what we are like.
B) others must treat us in a manner that we like.
C) once a shy person, always a shy person.
D) through self observation we can discover qualities that allow us to assume different self-labels.