Chorionic Villus Sampling Works Because the Chorionic Villus

Chorionic villus sampling works because the chorionic villus

A) eventually forms the zygote, so the chromosomes and genetic codes are the same as those in the fetus will be.
B) originates from the zygote, so the chromosomes and genetic codes are the same as those in the fetus.
C) allows the mother and baby to share the same blood supply.
D) contains all of the developing fetus's DNA and chromosomes.