TOEFL Reading: ETS-TOEFL阅读机经 - B7MMI54G5X4YU53NL$

According to paragraph 2, which of the following is true of turtle hatchlings that are trying to make their way to the sea? A. They are unable to distinguish the light of the rising Sun from other types of light. B. They require the presence of yellow light in order to reach the water's edge. C. They have trouble crossing downward slopes near the water's edge. D. They respond to light only when it is close to the horizon.