During a cloudy day,a primary and a secondary rainbow may be created,then the:

  • A
    primary rainbow is due to double internal reflection and is formed above the secondary one.
  • B
    primary rainbow is due to double internal reflection and is formed below the secondary one.
  • C
    secondary rainbow is due to double internal reflection and is formed above the primary one.
  • D
    secondary rainbow is due to single internal reflection and is formed above the primary one.

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