Since 1950, in the United States, There Has Been _____

Since 1950, in the United States, there has been _____

A) a dramatic increase in the population living in rural areas.
B) a decline in the number of women in the labor force.
C) a decrease in the opportunity cost of working in the home.
D) more specialization of production within households.
E) a dramatic increase in the number of married women in the labor force.