题目选项分析

During the last interglacial period, the climate on the Earth was warmer than it is today, and the consequent melting of the polar ice caps caused the level of the seas to be raised over their height, now about 60 feet.

During the last interglacial period, the climate on the Earth was warmer than it is today, and the consequent melting of the polar ice caps caused the sea level to rise about 60 feet above its present height.