Samantha Is a First-Time Expectant Mother at Age 35

Samantha is a first-time expectant mother at age 35.You can tell her that healthy women in their thirties have ___________ as women in their twenties.

A) a higher rate of prenatal complications,but a lower rate of birth complications
B) higher rates of prenatal and birth complications
C) a lower rate of prenatal complications,but a higher rate of birth complications
D) about the same rates of prenatal and birth complications