Question

the embryo will develop from the ____________ of the blastocyst.
a inner cell mass
b embryonic disk
c trophoblast
d amnion

Explanation:

The blastocyst has an inner cell mass. The inner cell mass is pluripotent and gives rise to the embryo. The trophoblast forms the placenta. The embryonic disk is part of later embryonic development after the inner cell mass differentiates. The amnion is a membrane that forms around the embryo later.

Answer:

A. inner cell mass