Select all that apply Identify the findings of a survey of parents, teachers, and students with attention deficit/hyperactivity disorder about the students' motivational style (Carlson, Booth, & Shin, 2002).

a. The students had a preference for easy work.
b. The students were motivated more by internal factors than external factors.
c. The students received more enjoyment from learning when compared to other students.
d. The students were less persistent when compared to other students.