TOEFL Reading: ETS-TOEFL阅读机经 - 63W163Q88YB558Q6L$

According to paragraph 1, which of the following best describes the relationship between humans twelve to thirteen thousand years ago and the "giant long-horned bison" A. Humans first came to the Americas as a result of following long horned bison that were migrating from Asia to the Americas. B. Humans in the Americas preferred hunting long-horned bison to hunting other animals. C. Humans in the Americas were forced to migrate south and east across the continent as a result of the presence of long-horned bison. D. Humans in the Americas generally ate plants and small animals because long-horned bison were difficult to hunt.