TOEFL Listening: TPO-TOEFL阅读TPO - N4_VVJ3M6027KT22N$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information A. A computer model was designed to determine how long it would have taken for a small group of hunters to spread across North America. B. A computer model showed that it was possible for a small group of hunters to spread across North America and kill off game animals in just 300 years. C. According to a computer model, people coming into North America 12,000 years ago had to kill game animals in order to feed their population. D. According to a computer model, about 12,000 years ago conditions enabled a small group of hunters to enter and cross North America in about 300 years.