A researcher wants to know what percentage of students who live in rural areas of Florida attended college. He mails surveys to a random sample of n = 1,000 potential participants in 20 rural counties throughout Florida. He receives 988 of those surveys back and determines that he has an equal representation from each county. He finds that 43% of his sample did attend or was currently enrolled in college. Which type of study does this describe?

a. Quasi-experimental or Causal-comparative

b. Experimental

c. Correlational

d. Descriptive