A system administrator sets permissions for the company and creates a group for each department. While applying the principle of least privilege, what level of access should the administrator set for a department group whose members need the ability to access, create, and modify files?

A$.$Read $($r$)$ only access.

B$.$Read $($r$)$ and Write $($w$)$ access.

C$.$Execute $($x$)$ access.

D$.$Read $($r$),$ Write $($w$),$ and Execute $($x$)$ access.