Final answer:
David was a conformist because he wanted to please his parents, aligning his behavior with their expectations and norms.B is the correct answer.
Step-by-step explanation:
David's characteristics that show he was a conformist is b. he wanted to please his parents.
Conformity is the extent to which an individual complies with group norms or expectations. In the social context, behaving in ways that are pleasing to one's parents often aligns with conforming to the norms and expectations set by one's family, which can be considered one's immediate reference group.
In contrast, being athletic or dressing in the latest style does not necessarily indicate conformity as these could be personal preferences rather than actions motivated by a desire to fit into group norms.