27. Which of the following statements is a fact, not just a theory?
(A) The ancient tools found in America are analogous to those used by people in southwestern Europe.
(B) The first people in the Americas arrived about 14,000 years ago.
(C) Various groups of people came to the Americas at intervals.
(D) Ancient people might have traveled to the Americas by boat.
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統計: A(68), B(15), C(23), D(18), E(0) #810265
統計: A(68), B(15), C(23), D(18), E(0) #810265