Pls explain why the answer is .33.

Consider the following payoff table.

Based upon these probabilities, a person would select Alternative 2.Suppose there is concern about the accuracy of these probabilities.It can be stated that Alternative 2 will remain the best alternative as long as the probability of A is at least

A) 0.33.

B) 0.50.

C) 0.40.

D) 0.60.

E) None of the above