Bradley Nixon is interested in the study habits of online math students. As part of his study, he randomly selects 87 students enrolled in Liberal Arts Math 1, and surveys them on the number of hours that spend on that class in a given week. What is the population of this study?

A. All math students

B. Professors teaching Liberal Arts Math 1

C. Students enrolled in Liberal Arts Math 1

D. The 87 students surveyed

2. Gwen is interested in the effect of bananas on the speed and endurance of high school cheerleaders. She recruits 20 cheerleaders from high schools in California. Each cheerleader was asked to run as many laps as they could in 20 minutes on a standard 100M track. Two weeks later the same cheerleaders were asked to run as many laps as they could in 20 minutes, but were asked to eat a banana 10 minutes prior to starting. The number of laps completed (to the nearest quarter lap) was recorded. What is the sample of this study?

A. The 20 cheerleaders measured

B. All cheerleaders in California

C. Banana aficionados

D. All cheerleaders in California who regularly eat bananas

3. Sigmund Freud is interested in studying the dreams of adolescent boys (aged 10-19) to further his theories of psychology. To do so, he selected 20 adolescent boys by taking the school rosters from Vienna, placing the names of all the boys attending these schools into a large pot, and selecting 20 at random. What method did Dr. Freud use to select his sample?

A. Stratified

B. Systematic

C. Simple Random Sample