What is formed in part from the inner lining of the uterus and in part from other membranes?

I believe that the Placenta is formed in part from the inner lining of the uterus and in part from other membranes. The placenta acts as a connection between the fetus and the mother; it contains the fetal placenta which develops from the same blastocyst that forms the fetus, and the maternal placenta which develops from the maternal uterine tissue. 

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.

Idk little ngr try paying attention in school and you would know ngr