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36. The main function of lines 64–66 in terms of the eighth paragraph (lines 59–66) as a whole is to:

 

 

  • F. give a sense of proportion to the numbers provided earlier in the paragraph.

     

  • G. point out the limitations of the evidence provided by the Iowa scientists.

     

  • H. supplement the paragraph’ s description of the comets with additional details about their size and capacity.

     

  • J. provide readers with a sense of how old the planet really is.