Aclique is a small group of people

a. who are part of an extended family.

b. with similar backgrounds and interests.

c. who value each other's differences.

d. who are all the same age.

Explanation:

In sociology, cliques are groups of individuals who share interest and interact each other. Interacting with this groups is part of the social development because it helps to find a personal identity. These groups are seen during teen ages where the identity is formed.

The best examples of cliques are found in school ages, there are groups formed according to ethnicity, economic status or stereotypes like athletes and nerds.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.