Hypergamy Can Best Be Described As

Hypergamy can best be described as:

A) a policy in which it is more acceptable for lower-class women to engage in sexual relations with men of higher socio-economic ranks than vice versa
B) a policy in which it is more acceptable for lower-class men to engage in sexual relations with women of higher socio-economic ranks than vice versa
C) a policy in which socio-economic ranks are not allowed to engage in sexual relations with anyone outside of their rank
D) a policy of marrying multiple spouses in a different array of social and economic ranks