Which non-concurrent capacity upgrade is possible for a customer with IBM FlashSystem 900?

A.
Systems purchased with eight 2 TB flash modules can be expanded to twelve 4 TB Flash modules.

B.
Systems purchased with eight 2 TB flash modules can be expanded to twelve 2 TB Flash modules.

C.
Systems purchased with eight 4 TB flash modules can be expanded to twelve 2 TB Flash modules.

D.
Systems purchased with eight 2 TB flash modules can be expanded to twelve 4 TB Flash modules.