单选题：Commonly, which identifier is not in the PCB (Process Control Bl

Commonly, which identifier is not in the PCB (Process Control Block) of a process? @[A](1)
A. The first child identifier of the process
B. The identifier of the parent process
C. The identifier of the process
D. The user identifier





A.The first child identifier of the process
B.The identifier of the parent process
C.The identifier of the process
D.The user identifier


答案：A