Correlation Research Is

Correlation research is:

A) research in which an investigator simply observes some naturally occurring behavior and does not make a change in the situation.
B) research in which people chosen to represent a larger population are asked a series of questions about their behavior,thoughts,or attitudes.
C) research in which the relationship between two sets of variables is examined to determine whether they are associated.
D) research in which existing data,such as census documents,college records,and newspaper clippings,are examined to test a hypothesis.