Answer:
(C) Systematic Sampling
Step-by-step explanation:
The reporter decides to interview every fifth student of Ohio State University that passes by. This is referred to as Systematic Sampling.
In Systematic Sampling, the members of the population are place in an ordered list and the members of the sample are taken at a stated interval. This interval is called the Sampling Interval.
Although the members of the sample are random, they are chosen at stated intervals.