What Is the Main Difference Between Polygyny and Polyandry

What is the main difference between polygyny and polyandry?

A) Both are forms of polygamy; polygyny occurs when one male mates with multiple females, and polyandry occurs when one female mates with multiple males.
B) Both are forms of polygamy; polygyny occurs when one male mates with multiple females, and polyandry occurs when one female mates with multiple males..
C) Polyandry involves the establishment of long-term social bond, whereas polygany does not.
D) Polygany always involves one male with multiple females, whereas polyandry can involve one female with multiple males.,
E) Polyandry and polygany are the same mating system.