A.It allows specifying long options (like --help) for commands that normally only accept short options (like - h)

B.It asks a question, graphically, and returns the answer to the shell.

C.It repeats the execution of a command using different parameters for each invocation.

D.It passes arguments to an X server.

E.It reads standard input and builds up commands to execute.

A.chmod 755+s /bin/foo

B.chmod u-s /bin/foo

C.chmod 1755 /bin/foo

D.chmod 2755 /bin/foo

A.--vacuum

B.--purge

C.

D.--declare

E.--remove

A.chmod g+ssales
setpol -R newgroup=sales sales

B.chown --persistent *.sales sales

C.

D.chgrp -p sales sales

E.chmod 2775 sales