Choose the correct option for the proportion of various greenhouse gases contributing to global warming.

  • A
    $60\%\ CO_2, 20\%\ CFCs, 14\%\ \text{Methane}, 6\%\ N_2O$
  • B
    $60\%\ CO_2, 14\%\ \text{Methane}, 6\%\ CFCs, 20\%\ N_2O$
  • C
    $20\%\ \text{Methane}, 6\%\ N_2O, 60\%\ CO_2, 14\%\ CFCs$
  • D
    $20\%\ CO_2, 6\%\ N_2O, 60\%\ \text{Methane}, 14\%\ CFCs$

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