Which year is older, or happened first?

A. 2020
B. 470
C. 5000 B. C.
D. 500 B. C.

C.

Explanation:

Think of it as a number line.  Anything before the year 0 will be labelled as B.C. The higher the number (labelled as B.C.) the older it is. So 5000 B.C. happened before 500 B.C.

the social historical theory explains the creation of the varnas, jats and of the untouchables. according to this theory, the caste system began with the arrival of the aryans in india. the aryans arrived in india around 1500 bc. the fair skinned aryans arrived in india from south europe and north asia.

just finished this it is b. centrifugal force