You need to ensure that all SharePoint site content and server farm configurations are backed up automatically every night

You deploy a server that has Microsoft SharePoint Foundation 2010 installed.

You need to ensure that all SharePoint site content and server farm configurations are backed up automatically every night.

What should you do?

A.
From Central Administration, configure a Full Backup.

B.
From Central Administration, configure a Granular Backup.

C.
Create a scheduled task that uses the Backup-SPSite cmdlet.

D.
Create a scheduled task that uses the Backup-SPFarm cmdlet.

Explanation:
Backup-SPFarm

Creates a backup of an individual database, Web application, or the entire farm.

Backup-SPFarm -BackupMethod <String> -Directory <String> [-AssignmentCollection <SPAssignmentCollection>] [-BackupThreads <Int32>] [-ConfigurationOnly <SwitchParameter>] [-Confirm [<SwitchParameter>]] [-Force <SwitchParameter>] [-Item <String>] [-Percentage <Int32>] [-WhatIf [<SwitchParameter>]]

Source: http://technet.microsoft.com/en-us/library/ff607881.aspx

Backup-SPSite

Performs a backup of a site collection.

Backup-SPSite [-Identity] <SPSitePipeBind> -Path <String> [-AssignmentCollection <SPAssignmentCollection>] [-Confirm [<SwitchParameter>]] [-Force <SwitchParameter>] [-NoSiteLock <SwitchParameter>] [-UseSqlSnapshot <SwitchParameter>] [-WhatIf [<SwitchParameter>]]

Source: http://technet.microsoft.com/en-us/library/ff607901.aspx