Choose the correct option from the following.

  • A
    The elements present in the Earth's crust are also found in samples of living tissues.
  • B
    Detailed analysis shows that the amount of carbon and hydrogen is generally higher in any living organism compared to the Earth's crust.
  • C
    Elemental analysis of both living organisms and the Earth's crust reveals the presence of $C$,$H$,$O$,and other elements.
  • D
    All of the above.

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