You have a SharePoint Server 2010 server farm.

You need to back up the contents of a SharePoint site every day.

The solution must minimize the amount of administrative effort.

What should you do?

A.
Create a scheduled task that runs the export-spsite cmdlet

B.
Create a scheduled task that runs the backup-spsite cmdlet.

C.
From Central Administration, click Perform a backup.

D.
From Central Administration, click Perform a site collection backup

Explanation:
BURGOS MNEMO: "(backup) minimize the size" = "backup-spsite cmdlet"

@Jorbes explanation:
The export cmdlet creates an export file that you can use to import the content elsewhere, the backup cmdlet actually creates a backup.

Back up a site collection (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/ee748617.aspx