Which factor directly contributed to the post WWII development of communities such as Levittown?

A. rise in the birth rates

B. decrease in school construction

C. decline in the availability of home loans

D. increase in the number of women in the labor force

A. Rise in the birth rates.

Explanation:

After World War II, there was a massive rise in the birth rates, these people today are now called "baby boomers." Since there was a drastic rise in the birth rates, there needed to be more housing for the veterans, along with their increasingly large families. Levittown was just one of the many suburban places that mass-produced houses, that were affordable and contained many homes.