Regarding the Concept of the Expected Value of Perfect Information

Multiple Choice

Regarding the concept of the expected value of perfect information,

A) Expected value of perfect information means knowing in advance what state of nature will occur
B) Perfect information is easy to obtain
C) Expected value of perfect information is calculated by adding the expected payoff under perfect information to the expected payoff of the optimal decision without perfect information
D) It can be calculated without the use of probabilities