Which Statement Characterizes the Relationship Between Pregnancy and Rubella

Which statement characterizes the relationship between pregnancy and rubella?

A) If a woman is infected within the first 20 weeks of pregnancy, she is at lower risk than if she were infected later.
B) If a woman is infected within the first 20 weeks of pregnancy, the newborn may have birth defects.
C) Women who had rubella as children are at an increased risk of being infected during pregnancy.
D) Rubella during pregnancy is relatively harmless to the mother and child.