You have created a tar archive of a source code directory. You now want to compress the file
using the gzip utility. Choose the command that you could use to compress the file.
A.
gzip -c source_code.tar
B.
gzip -d source_code.tar
C.
gzip source_code.tar
D.
gzip -cvf source_code.tar.gz source_code.tar
Explanation: