Your network contains a server named Server1 that runs Windows Server 2008 R2. Server1 has the Streaming Media Services role and the Web Server (IIS) role installed. Server1 has a broadcast publishing point named Broadcast1. Broadcast1 publishes a file named Broadcast1.wmv.
You run the Unicast Announcement Wizard for Broadcast1 and create a new announcement file. You need to ensure that only authorized users have permission to access the announcement file.
What should you modify?

A.
the Authentication settings for Broadcast1

B.
the Authorization settings for Broadcast1

C.
the NTFS permissions on c:inetpubwwwrootBroadcast1.asx

D.
the NTFS permissions on c:wmpubwmrootBroadcast1.wmv