题目选项分析

Whereas a female grizzly bear in the Rockies typically occupies a range of 50 to 300 square miles, a male will cover 200 to 500 and occasionally as many as 600.

Unlike a female grizzly bear in the Rockies, which typically occupies a range of 50 to 300 square miles, a male's range will cover 200 to 500 and occasionally as many as 600.