Within groups, informal rules of behaviour are called:

A) beliefs.
B) values.
C) norms.
D) social agreements.

Norms

Shared guidelines or rules within a group that dictate appropriate and expected behavior among members.

Social Agreements

Unwritten and often unspoken rules or understandings that govern the behavior of members within a society or group.

Beliefs

Convictions or acceptances that something exists or is true, especially without proof.