Final answer:
Amniocentesis is a test in which a needle is used to withdraw amniotic fluid and cells from the sac surrounding the fetus for testing.
Step-by-step explanation:
The correct answer is C) Amniocentesis.
Amniocentesis is a test in which a needle is used to withdraw a small amount of amniotic fluid and cells from the sac surrounding the fetus for testing. The fluid contains fetal cells that can be examined for genetic defects and other aspects of the baby's genetic health. It can also be a source of non-embryonic stem cells.