Which of the Following Choices Is Not True About Decision

Which of the following choices is not true about decision theory?

A) Decision alternatives for one person can be states of nature for another.
B) Payoffs are always positive or zero.
C) If you play a card game at a casino, the cards you are dealt are states of nature.
D) If you decide to take a MOOC (massive open online course) , how much you learn is a payoff.
E) In a two-person interaction, it is possible that the sum of the two payoffs is positive.