24.In humans, identical twins are possible because
(A)of interactions between extraembiyonic cells and the zygote nucleus.
(B)of the heterozygeneous distribution of cytoplasmic determinants in unfertilized eggs.
(C)the gray crescent divides the dorsal-ventral axis into new cells.
(D)of convergent extension.
(E)the blastomeres are genetically the same.