When using MetroCluster in a forced takeover mode, identify two methods for restricting access to the disaster
site node. (Choose two)

A.
Use manual fencing

B.
Use the cf giveback -f command.

C.
Use the cf forcetakeover -d command.

D.
Turn off power to the disaster site node.

E.
Isolate the failed node from the surviving node.

Explanation:
http://vipulvajpayeestorage.blogspot.com/2012/01/manually-failover-activity-in-netapp.html
In order to test or effect a Disaster Recovery operation, you must restrict access to the disaster site node
to prevent the node from resuming service. If you do not, you risk the possibility of data corruption.
Access to the disaster site note can be restricted in the following ways:
Turn off the power to the disaster site node
Use “manual fencing” (Disconnect VI interconnects and fiber channel cables; either physically or through
configuration changes on the fabric switches.)
Isolating the failed node from the surviving node could still lead to the possibility of a split brain, so this is not a
correct answer.