You administer a Microsoft Azure SQL Database database in the US Central region named
contosodb. Contosodb runs on a Standard tier within the SI performance level.
You have multiple business-critical applications that use contosodb.
You need to ensure that you can bring contosodb back online in the event of a natural
disaster in the US Central region. You want to achieve this goal with the least amount of
downtime.
Which two actions should you perform? Each correct answer presents part of the solution.

A.
Upgrade to S2 performance level.

B.
Use active geo-replication.

C.
Use automated Export.

D.
Upgrade to Premium tier.

E.
Use point in time restore.

F.
Downgrade to Basic tier.

Explanation:
Note: Active Geo-Replication is only supported for databases in the Premium service tier.
Ref: http://msdn.microsoft.com/en-us/library/azure/dn741339.aspx