Which of the following is not a condition required for the regression procedure used in the exercises above to be statistically valid? Select all that apply.

A. The true errors must be normally-distributed.
B. The explanatory variable must be normally-distributed
C. The true relationship between the response and explanatory variables must be linear
D. The size of the sample must be sufficiently large, i. e., greater than n = 25
E. The response variable must be normally-distributed.