Rabiyah Administered an Intelligence Test to Sophomores and Seniors at Faber

Multiple Choice

Rabiyah administered an intelligence test to sophomores and seniors at Faber College and at Hillman College and compared performance across these four groups. Which of the following is/are the subject variable(s) in this study?

A) Being a sophomore versus a senior only
B) Attending Faber versus Hillman College only
C) Scoring high versus low on intelligence
D) Both being a sophomore versus a senior and attending Faber versus Hillman College