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Which two will allow a fully loaded Cisco MDS 9509 Multilayer Director to meet the 2190-W requirement? (Choose two.)

A.
two 110-V power supplies that are placed into active/standby power mode

B.
two 220-V power supplies in redundant mode

C.
two 110-V power supplies that are placed into combined power mode

D.
two 110-V power supplies in redundant mode