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Direct load control gives a more reliable reduction than a price signal because

  • A.it reduces consumption rather than shifting it
  • B.it is available at far shorter notice than any tariff is
  • C.it does not depend on the consumer noticing or acting
  • D.it applies to a larger number of consumers

Answer: C

Correct answer: it does not depend on the consumer noticing or acting

A price signal invites a response and may or may not receive one. Direct load control switches the equipment itself, so the reduction is known before the event and can be counted on for system planning. That certainty is why utilities pay for control rights on air conditioners and water heaters.

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