To Demonstrate That an Increase in Advertising Causes a Sales

Multiple Choice

To demonstrate that an increase in advertising causes a sales increase,one must be able to show that the increase in advertising occurred before the increase in sales.Which of the preconditions for causation is being illustrated?

A) correlation
B) appropriate time order of occurrence
C) elimination of all possible causal factors
D) elimination the effects of the independent variable
E) none of these