A "Causal Relationship" Means That ________

A "causal relationship" means that ________.

A) it is virtually impossible to determine the cause of either variable
B) a decrease in one variable is related to an increase in another variable
C) an increase in one variable is related to a decrease in another variable
D) an increase in one variable is related to an increase in another variable
E) changes in one variable causes changes in another variable