Which of the Following Describes the Embryonic Period

Which of the following describes the embryonic period?

A) the period during which the zygote moves down to the uterus and begins to implant in the linin.
B) the period during which the major organs and structures of the organism first develo.
C) the period during which the umbilical cord develops
D) the period during which tremendous growth occurs and the organs continue to develop and become functional
E) the period during which the endometrium is shed from the lining of the uterus and is evacuated out the vagina