Refer to the Exhibit.
A company has three data centers and has decided to protect its data using SRDF. The replication design must ensure there will be no data loss if Site A fails. All data centers are within 200 km of each other. Either Site B or Site C should be able to take over as production sites in the event of the failure of Site A.
How should SRDF be configured between Sites A and B, and how should devices be configured at Site B?
A. SRDF/S between Sites A and B with disk-based R21 devices at Site B
B. SRDF/A between Sites A and B with disk-based R21 devices at Site B
C. SRDF/S between Sites A and B with disk-less R21 devices at Site B
D. SRDF/A between Sites A and B with disk-less R21 devices at Site B
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