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