How should the components be set up for this environment?

A.
Configure a NetScaler cluster. Place the StoreFront servers and Delivery Controllers in the internal network
B.
Configure NetScaler high availability. Place the StoreFront servers and Delivery Controllers in the internal network.
C.
Configure a back-up vServer. Place the StoreFront servers and Delivery Controllers in the internal network.
D.
Configure GSLB for the StoreFront servers and Delivery Controllers and place them in the internal network.