TOEFL Reading: ETS-TOEFL阅读机经 - 837P8364CL673M5JL$

Which of the following can be inferred from paragraph 1 about grazing animals? A. They spend significantly more time looking down at the ground than they do with their heads raised. B. They tend to remain within a relatively small area for extended periods of time. C. They are extremely difficult for predators to see as long as they remain motionless. D. They can run significantly faster than most of their predators.