4. Suppose the probability of event A is 0.23, the probability of the intersection of event A and event Bis 0.12, and the probability of the union of event A and event B is 0.34. Find the probability of the complement of event B.
(A) 0.11
(B) 0.23
(C) 0.48
(D) 0.52
(E) 0.77