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A cloud region is

  • A.a single data centre building
  • B.a network subnet of addresses
  • C.a category used for billing
  • D.a geographic area of zones

Answer: D

Zones within a region are isolated for failure but connected with low latency. Deploying across zones protects against a single facility failure while staying within one region. Zones fail independently. Two regions are needed for regional resilience. Zone failure is the case a pair protects against.

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