题目选项分析

Caribou are wary animals with excellent hearing, so to stalk them over the treeless landscape and get close enough to kill one with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill.

Caribou are wary animals with excellent hearing, and so stalking them over the treeless landscape and getting close enough in order to kill it with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill.