Suppose We Find That There Is a Correlation Between the Cleanliness

Multiple Choice

Suppose we find that there is a correlation between the cleanliness of a student's room and how much time that student spends studying.By itself, this would not prove that having a clean room causes students to study longer, because there could be a confounding variable.What is the most likely candidate?

A) difficulty of classes
B) number of roommates
C) noise level in the room
D) self-discipline of the student
E) availability of cleaning products