Chorionic Villi Sampling Is a Procedure That

Chorionic villi sampling is a procedure that

A) can be administered at the ninth or tenth week of pregnancy, considerably earlier than amniocentesis.
B) removes cells from the amniotic fluid for biopsy during the early months of pregnancy.
C) is typically performed at 16 weeks, considerably later than amniocentesis.
D) is typically done just before birth to detect any complications.