单选题：Which of the following descriptions is wrong?
Which of the following descriptions is wrong? @[A](1)
A. a process is an entire program that runs in a multi-programming environment
B. a process can be described by its program, data and process-control-block
C. a thread is a light-weight process
D. a process is an independent unit in the system for resource allocation and scheduling
A.a process is an entire program that runs in a multi-programming environment
B.a process can be described by its program, data and process-control-block
C.a thread is a light-weight process
D.a process is an independent unit in the system for resource allocation and scheduling
答案：A
A. a process is an entire program that runs in a multi-programming environment
B. a process can be described by its program, data and process-control-block
C. a thread is a light-weight process
D. a process is an independent unit in the system for resource allocation and scheduling
A.a process is an entire program that runs in a multi-programming environment
B.a process can be described by its program, data and process-control-block
C.a thread is a light-weight process
D.a process is an independent unit in the system for resource allocation and scheduling
答案：A