Cultural differences that are considered socially significant and are thought to divide the population into socially distinct subgroups are called

The appropriate response is ethnicity. It is a class of individuals who relate to each other in view of likenesses, for example, normal parentage, dialect, society, culture or country. Ethnicity is regularly utilized synonymously with uncertain terms, for example, country or individuals. In English, it can likewise have the implication of something intriguing, by and large identified with societies of later settlers, who landed after the establishing populace of a range was built up.

Idont know which one is right   but i know that c is wrong and a might be wrong