The Major Difference Between an Embryo and a Fetus Is

The major difference between an embryo and a fetus is that

A) a fetus can survive outside the mother's womb but an embryo cannot.
B) a fetus is smaller than an embryo.
C) organ systems are developing in an embryo while all organs are present in a fetus.
D) a fetus is a male child while an embryo is a female child.
E) None of the choices are correct.