One Study Found That Following the Birth of a Baby

One study found that following the birth of a baby to a couple who is living together

A) the father married the mother shortly after the birth of the baby in most families.
B) the father married the mother in only 10% of the families within one year of the baby's birth.
C) the partners continued to live together although they usually didn't marry.
D) the father married the mother in 80% of the families but it was usually after the birth of a second baby.