The Third Variable Problem Refers to the Fact That

The third variable problem refers to the fact that:

A) experiments allow researchers to assess relationships between independent variables,dependent variables,and third variables.
B) almost all phenomena in social psychology are driven by the interaction between three identifiable variables.
C) a correlation between two variables may be driven by their mutual association with another variable.
D) researchers in social psychology tend to statistically investigate the relationships between only three variables at a time.