Based on the Following Payoff Table, Answer the Following The Expected Value of Perfect Information Is:
A) ?28

Based on the following payoff table, answer the following:
$$\begin{array} { | l | r | r | r |} \hline { \text { Alternative } } & \text { High } & { \text { Medium } } & { \text { Low } } \\\hline \text { A } & 20 & 20 & 5 \\\hline \mathrm { B } & 25 & 30 & 11 \\\hline \mathrm { C } & 30 & 12 & 13 \\\hline \mathrm { D } & 10 & 12 & 12 \\\hline \mathrm { E } & 50 & 40 & - 28 \\\hline \text { Prior Probability } & 0.3 & 0.2 & 0.5 \\\hline\end{array}$$
The expected value of perfect information is:

A) ?28.
B) 0.
C) 10.5.
D) 19.
E) 23.