In the Prenatal Diagnostic Technique Amniocentesis

In the prenatal diagnostic technique amniocentesis,

A) a needle is inserted into the umbilical cord to collect fetal blood for screening.
B) a thin, flexible tube connected to a needle is inserted through the vagina and into the uterus to collect a tissue sample.
C) fetal blood is collected directly from the chorionic villi near the cervix.
D) a needle is inserted through the abdominal wall to collect amniotic fluid containing fetal cells.
E) the procedure cannot be performed after the fifteenth week of gestation.