Which single compound ‘chmod’ command would achieve the same result as these four comman

Which single compound ‘chmod’ command would achieve the same result as these four commands?
chmod g-w mydir chmod o-w mydir chmod g+x mydir chmod o+x mydir

A.
chmod go+w mydir

B.
chmod go-w mydir

C.
chmod go-w-x mydir

D.
chmod go-w+x mydir