Which of the following techniques could we use to evaluate the effect of sales at one coffee shop versus sales at another coffee shop, so see if the

Which of the following techniques could we use to evaluate the effect of sales at one coffee shop versus sales at another coffee shop, so see if the two shops might be cannibalizing business from one another?

A.Correlation Coefficient

B.Scatter Plots

C.Crosstabulation

D.All of the above