The Following Table Shows the Expected Value and Variance for 5

The following table shows the expected value and variance for 5 projects a firm can undertake. $$\begin{array} { c c c } \text { Project} & \text { Expecled Value} & \text { Variance } \\A & \$ 100 & \$ 124 \\B & \$ 220 & \$ 110 \\C & \$ 100 & \$ 138\\D & \$ 100 & \$ 138 \\E & \$ 200 & \$ 124\end{array}$$ Which of the following is (are) correct if the mean-variance rule is used for the decision?

A) Project C is preferable to A.
B) Project E is preferable to B.
C) Project D is preferable to C.
D) all of the above
E) none of the above