Which of the following actions should you take FIRST?

You are employed as an administrator at ABC.com. ABC.com network has an Active Directory
forest, named ABC.com. All servers on the ABC.com network have Windows Server 2012
installed.
ABC.com has a member server, named ABC-SR07, and a standalone server, named ABC-SR13.
You have been informed of the intended Office 365 tenant deployment.
You plan to provision users via the Windows Azure Active Directory Sync tool.
Which of the following actions should you take FIRST?

A.
You should consider installing and running the Windows Azure Active Directory Sync tool on
ABC-SR07.

B.
You should consider installing and running the Windows Azure Active Directory Sync tool on
ABC-SR13.

C.
You should consider installing and running the AD FS on ABC-SR07.

D.
You should consider installing and running the AD FS on ABC-SR13.

Explanation:
http://technet.microsoft.com/en-us/library/jj151831.aspx