Which upgrade is possible for a customer with IBM FlashSystem 840?
A . Systems purchased with eight 2 TB flash modules can be expanded to twelve 4 TB flash modules.
B . Systems purchased with eight 4 TB flash modules can be expanded to twelve 2 TB flash modules.
C . Systems purchased with eight 2 TB flash modules can be expanded to twelve 2 TB flash modules.
D . Systems purchased with eight 4 TB flash modules can be expanded to twelve 2 TB flash modules.
Answer: C