Which of the Following Help Explain the Increase in the U.S

Which of the following help explain the increase in the U.S. labor force participation rate for women?
I. There was a significant fall in the number of children women were choosing to have. ii. There was an increase in the educational level of women.
Iii. Technological change in the home increased the time available for work outside the home.

A) i, ii, and iii
B) i and ii
C) ii only
D) i only
E) ii and iii