Which Mating System Would a Species Likely Display If Offspring

Multiple Choice

Which mating system would a species likely display if offspring survival is low when only the mother is present at the nest and fathers have almost no chance of finding another mate?

A) Promiscuity
B) Polyandry
C) Polygyny, with males defending females
D) Polygyny, with males defending small territories on a lek
E) Monogamy