Which two actions should you perform?

You need to meet the requirements for the projects.contoso.com site.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
A. Add the Site Mailbox app to the site.
B. Create a distribution list, and add the project team members to the distribution list.
C. Add all the project team members to the Members group of the site.
D. Create an AD security group, and add all the project team members to the security group.
E. Email-enable a document library app on the site.