JAVA/Sun Exam Questions

what is the function of the zcat command?

Jane has stored files in a compressed tar archive. She extracts the data with the following command:
$ zcat keyfiles.tar.Z | tar tvf –
Examine the command line, what is the function of the zcat command?

A.
The zcat command uncompresses the file and directs the output to the pipe.

B.
The zcat command uncompresses the file and outputs to a file called –

C.
The zcat command uncompresses the file and write the output to disk.

D.
The zcat command uncompresses the data from the tar commands output.