Adolescence, Compared to Earlier Development, Is a Period of Problematic

Adolescence, compared to earlier development, is a period of problematic adherence to medical regimens because of which of the following?

A) Professionals often underestimate the adolescent's knowledge of the disease.
B) Parents often refuse to give up control.
C) The adolescent may have low self-efficacy in regard to the ability to manage the illness.
D) These teens tend to have few friends so they have no one to help them monitor their illness.