Questão número 637615

The pronoun IT in “that helps to protect it from the sun's ultraviolet radiation” (paragraph 3), the pronoun THESE in “and these are often marked ozonefriendly” (paragraph 3), and the pronounTHEYin “and when they are cut down or burned” (paragraph 4), refer in the text, respectively, to:

• A.

  the surface of the Earth / aerosols / many rainforests

• B.

  the Earth / aerosols that do not contain CFCs / rainforests

• C.

  the ozone layer / chlorofluorocarbons / many plant and animal species

• D.

  the sun's ultraviolet radiation / refrigerators and aerosol cans / the tropical rains

• E.

  a layer of gas high above the surface of the Earth / some plastic products / poor soils