Which of the following is an example of changing gender roles?

A. Fewer women worked outside the home during World War II than
before the war started.

B. American women worked in factories and on farms when most of
the men were at war in World War II.

C. The passage of the Equal Rights Amendment made it possible for
women to see combat in the armed forces.

D. Most women decided not to get married and have a family while
World War II was going on.