An EMT is presenting a continuing education class on the care of the pregnant female. When discussing the amniotic sac, he is correct to emphasize which point?

A) The amniotic sac contains fluid and surrounds and protects the uterus
B) The amniotic sac contains a fluid called Wharton's jelly that protects the baby while in the uterus
C) The amniotic sac must rupture during the second trimester of pregnancy for the third trimester to progress
D) The amniotic sac protects and insulates the baby during gestation

D) The amniotic sac protects and insulates the baby during gestation