Questões de Concurso Militar Quadro Complementar 2022 para 2º Tenente - Eletrônica

Which option completes the sentence below correctly?
Norwegian explorer and writer Thor Heyerdahl had attempted to prove that the Polynesian islands could have been colonized______ people ______South America______ pre-Colombian times,
(Adapted from<https://www.deeperblue.com/fantastic-voyages-myth-legend-and-the-recreation-of-ancient-boats> )