The correct answer is C. Reference group
Explanation:
In sociology, groups are classified according to their features and function for individuals, this includes primary groups, secondary groups, and reference groups. In the case of the reference group, this includes groups of people such as classmates, co-workers or any other peer group in which individuals share common features or roles and therefore this type of groups mainly serve to the individual as a standard for comparison. For example at school children compare the grades and achievements in the class of their classmates with own grades and achievements. Therefore, the type of social group that serves as a standard of comparison is the Reference group.
