During a total solar eclipse,the Fraunhofer lines become clearly visible because...

  • A
    The moon covers both the photosphere and the chromosphere of the sun.
  • B
    Sunlight is scattered by the moon.
  • C
    The moon blocks the radiation from the chromosphere.
  • D
    The moon blocks the radiation emitted by the photosphere,and the radiation emitted by the chromosphere reaches the earth.

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