Irritation or damage to the inner uterine lining could prevent which of the following?

A. Cleavage of the blastocyst
B. Cleavage of the zygote
C. Implantation of the zygote
D. Implantation of the blastocyst

Respuesta :

i think it is C  because it seems best        
I'm pretty sure it's
"D. Implantation of the blastocyst."