Answer:
The correct answer is letter "C": the 170 students who were interviewed.
Step-by-step explanation:
The target population is a portion, a certain amount of the whole population -the universe- that shares similar characteristics. In the example, at first, we are told that the research will take place among 17 American colleges. Then, on each campus, 10 volunteers are enrolled. So:
10x17=170
Meaning 170 students total will be the target population for this research.