Based on This Following Abstract Taken from a 2012 Issue

based on this following abstract taken from a 2012 issue of Psychological Science . The authors of the paper examined the effects of an intervention on adolescents' enrollment in STEM courses. Instructors are advised to use the reference below to retrieve the original abstract for their use.
Harackiewicz, J. M., Rozek, C. S., Hulleman, C. S., & Hyde, J. S. (2012) . Helping parents to motivate adolescents in mathematics and science an experimental test of a utility-value intervention. Psychological Science, 0956797611435530.
-With regards to the dependent variable, what was the population of interest in this study?

A) Adolescent students
B) Students of all ages
C) Parents of adolescent students
D) Parents of students taking math and science courses