Which Question Is Best Addressed with the Experimental Strategy

Multiple Choice

Which question is best addressed with the experimental strategy?

A) What is the average number of hours of sleep that a typical college student gets each night?
B) Is there a relationship between the amount of sleep that college students get each night and the GPA of those college students?
C) Does increasing the hours of sleep college students get each night cause an increase in GPA?
D) What career choices are most popular among students with high GPAs?