This statement is valid for Maria
c. She has an internal set of standards regarding right and wrong behavior, and she feels guilty when she violates those standards.
Explanation:
Maria is a person that social cognitive theorists would describe as a self-regulating person when it comes to her moral behavior.
This means that morally she has a set of standards that are entirely her own and she behaves according to them and does not expect any outside influence to tell her how she must behave in front of the people.
Her behavior is dictated by her own set of rules failing which she would feel a real sense of guilt too