Which of the following describes how parents and teachers can promote high levels of achievement in adolescents?

a. Tap into Extrinsic Motivation by paying adolescents to do their work.
b. Tap into Intrinsic Motivation by only requiring work in areas that already interest adolescents.
c. Don't have expectations for adolescent achievement.
d. Use appropriate incentives for tasks that are difficult to master, and use adolescent interest to create activities.