Which Feature Would You Predict Would Be Found in Monotremes

Multiple Choice

Which feature would you predict would be found in monotremes (egg-laying mammals) ?

A) The eggs have little or no yolk.
B) A trophoblast is present in the embryo.
C) The hypoblast contributes to a placenta.
D) The embryo derives nourishment from the maternal circulation.
E) The allantois functions as a reservoir for nitrogenous waste.