Betty, Who Became a Mother in 1961, Did Not Return

Betty, who became a mother in 1961, did not return to work after her daughter Lisa was born. Which of the following is most likely to be true about Lisa, who became a mother in 1990?

A) she did not return to work at all after her son was born
B) she returned to work only after her second child was born in 1994
C) she returned to work within three weeks, but her husband left his job to care for their child full time
D) she returned to work when their first child was one year old