In Regression Analysis, Which of the Following Is NOT a Required

Multiple Choice

In regression analysis, which of the following is NOT a required assumption about the error term, $\varepsilon$ ?

A) expected value of the error term is zero
B) error term has a normal distribution
C) standard deviation of the error term is constant for all values of x
D) values of the error term are independent
E) none of the above, all are required assumptions