You need to ensure that specified SharePoint users can search the Exchange mailboxes of all employees, place holds on mailbox data, and export mailbox data

You are configuring a SharePoint farm in an environment that includes Microsoft Exchange Server
2013.
You need to ensure that specified SharePoint users can search the Exchange mailboxes of all
employees, place holds on mailbox data, and export mailbox data.
What should you do first?

A.
Configure forms-based authentication between SharePoint and Exchange.

B.
Create an external content type for Exchange mailbox information.

C.
Define a group target application in the Secure Store that contains Exchange connection
information.

D.
Configure SharePoint and Exchange to use the same realm name.