In a perfect Bayesian equilibrium

A. Each player chooses an action specified by Bayes rule B. Each player applies the rule of thumb to make decisions C. Each player randomizes 50-50 when uncertain what to choose D. Each player chooses an optimal action given his or her beliefs

Which combination is correct, select one.

a. D b. A, B

c. A, D

d. A, C

e. All of them

f. B, C, D