You enter the command cat MyFile | sort > DirList & and the operating system displays
[4] 3499
What does this mean?
A. This is job number 4 and the PID of the sort command is 3499.
B. This is job number 4 and the PID of the job is 3499.
C. This is job number 3499 and the PID of the cat command is 4.
D. This is job number 4 and the PID of the cat command is 3499.
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