Saria and Kara are life partners. Kara, who is an engineer, teaches Saria how to change the oil in her car. This helps Saria feel like a more capable car owner and helps her feel that she knows more about how her car runs. This most exemplifies which theory of how the self is social?

A. self-presentation

B. theoryself-discrepancy

C. theoryself-expansion theory

D. self-perception theory