Which statement describes the preceding diagram?
A. cluster ZS5-4 controllers with four HBAs connected to four DE2-24 disk shelves in four chains
B. cluster ZS5-4 controllers with two HBAs connected to four DE2-24 disk shelves in four chains
C. cluster ZS5-4 controllers with two HBAs connected to eight DE2-24 disk shelves in four chains
D. cluster ZS5-4 controllers with four HBAs connected to eight DE2-24 disk shelves in four chains