题目选项分析

The eyes of the elephant seal adapt to darkness more quickly than do those of any other animal yet tested, allowing it to hunt efficiently under the gloomy conditions at its feeding depths of between 300 and 700 meters.

Because the eyes of the elephant seal adapt to darkness more quickly than do those of any other animal yet tested, it allows them to hunt efficiently under the gloomy conditions at its feeding depths of between 300 and 700 meters.