Questão 768239

Which option completes the sentence below correctly?

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Norwegian explorer and writer Thor Heyerdahl had attempted to prove that the Polynesian islands could have been colonized ___ people ___ South America ___ pre-Colombian times.

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(Adapted from <https:l/www.deeperblue.com/fantastic-voyages-myth-legend-and-the-recreation-of-ancient-boats>}