Which command would you put in your ~/.profile to ensure that all new files you create are readable by people who are in the same group while anybody else has no access at all?

Which command would you put in your ~/.profile to ensure that all new files you create are readable by people who are in the same group while anybody else has no access at all? (choose the best answer)

A.
umask 640

B.
ulimit 750

C.
umask 027

D.
ulimit 640