Historically, Total Fertility Rate in the U.S

Historically, total fertility rate in the U.S:

A) has steadily increased since the turn of the 20ᵗʰ century.
B) rose around the Great Depression and then deceased during the 1950s.
C) has steadily decreased since the turn of the 20th century.
D) fell during the Great Depression and then rose in the 1950s.
E) have remained relatively consistent.