Drag and Drop Question
You need to configure a distribution group named CustomerService that has the following
configurations:
– A user named CSManager must be the only user allowed to add members to
CustomerService.
– All email messages sent to CustomerService must be approved by CSManager.
– External users must be allowed to send email messages to CustomerService.
You configure CSManager as the group owner. What should you configure in the Exchange admin
center for each requirement? To answer, drag the appropriate configurations to the correct
requirements. Each configuration may be used once, more than once, or not at all. You may need
to drag the split bar, between panes or scroll to view content.
Answer: 
Agreed
Ownership
Moderation
Delivery management
https://technet.microsoft.com/en-us/library/bb124513(v=exchg.150).aspx
i am also agreed
Membership approval – already set user as owner
Message approval (moderation)
Delivery Management