Which of the following is wrong about the description of the waitpid() function()
选项：

A:Waitpid () temporarily stops the execution of the current process until a signal arrives or the child process finishes.
B:If the child process has ended when the waitpid is called, the waitpid immediately returns the value of the child process's end state.
C:The end status value of the child process is returned by the parameter status.
D:Returns the child process number (PID) on success and 0 if an error occurs.