After Installation Windows Server 2008 Standard Edition,you Have Attempted to Activate

After installation Windows Server 2008 Standard Edition,you have attempted to activate Windows.Unfortunately,the activation process fails.Because you are using a Multiple Activation Key (MAK) ,what must you do first before you can activate Windows Server 2008?

A) Contact Microsoft Support to receive a valid activation key,because MAKs are only used for obtaining licenses through Microsoft,not activating servers.
B) You must install a special MAK license file to c : \ Windows\ licenses\ w2k8-std
C) You must change your product key to match the MAK key given,then perform the activation.
D) Renew your subscription to Microsoft's Key Licensing Services and re-validate the key