13. Choose the correct statements from the multiple choices regarding deadlocks
(A)If the resource allocation graph contains a cycle, then the system is deadlocked
(B) If a system is in an unsafe state, then there is no allocation sequence that allows the
processes to finish executing
(C)Pretending that deadlocks never occur in the system is a method to deal with deadlocks
(D)Banker's algorithm is a deadlock prevention algorithm
(E) None of the above