Which of the Following Statements About Early Embryonic Development in Humans

Which of the following statements about early embryonic development in humans is false?

A) The embryo is moved along the oviduct by ciliary action and muscular contraction.
B) The embryo develops through the blastula stage while floating free in the uterus.
C) The embryo enters the uterus about 24 hours after fertilization.
D) Early division of the embryo occurs in the oviduct.
E) Implantation of the embryo occurs about seven days after fertilization.