You have a SharePoint Server 2010 server farm that contains a Web server and a database server.

You have a sharepoint web site that contains large multimedia files.

The multimedia files are accessed frequently by a large number of users.

You must reduce the amount of traffic accessing the web server and the database server.

What should you do?

A.
From the web.config file of the web site, configure the BLOB cache settings.

B.
From Content Administration, modify the Web Application General Settings.

C.
From Site Collection Administration, enable the Publishing Infrastructure and configure the object cache settings.

D.
From Site Collection Administration, enable the Publishing Infrastructure and configure the output cache settings.

Explanation:
Cache settings operations (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/cc261797.aspx

Configure cache settings for a Web application (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/cc770229.aspx#BLOB