Your company uses both a distribution group and a security group for each department. Both groups contain the same members. All new users are added to both groups in their departments. You need to decrease the amount of time that is required to manage groups. You must achieve this goal while minimizing disruption to mail capabilities and to previously assigned access permissions. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
Delete the departmental distribution groups.

B.
Delete the departmental security groups.

C.
Convert the departmental distribution groups to global security groups.

D.
Mail-enable the departmental security groups.

E.
Mail-enable the converted global security groups.