If DB2 detects a deadlock between application A and application B (each waiting for a lock held by the other one), what action will DB2 take?（）

A、Rollback the transaction in both applications.

B、Rollback the transaction in one of the two applications.

C、Decrease the lock timeout value for both applications, thereby causing a lock timeout situation.

D、Send a message to let the administrator know of the situation and decide which application or applications should be terminated.