In Their Research Exposing Subjects to the Virus That Causes

In their research exposing subjects to the virus that causes the common cold, what did Cohen and colleagues (1997) demonstrate?

A) The quality of social contact predicted whether the individual would contract a cold, but the frequency of social contact did not.
B) The frequency of social contact and chances of contracting a cold were unrelated.
C) The less frequent the individual's social contact, the lower the chances of contracting a cold.
D) The more frequent the individual's social contact, the lower the chances of contracting a cold.