A Third Variable Problem Is Most Likely to Occur

A third variable problem is most likely to occur:

A) When 2 correlated variables (X and Y) are caused by a third variable (Z) that is responsible for the relationship of X and Y
B) When correlation does not cause equal causation
C) When the scores of two variables are unrelated
D) When two variables are perfectly related such that an increase in variable X can be associated with a predictable increase in variable Y