题目选项分析

During the early years of European settlement on a continent that was viewed as "wilderness" by the newcomers, Native Americans, with their intimate knowledge of the ecology of the land, helped to rescue many Pilgrims and pioneers from hardship, or even death.

During the early years of European settlement on a continent that was viewed as "wilderness" by the newcomers, Native Americans knew the ecology and the land intimately and this enabled them to help in the rescue of many Pilgrims and pioneers from hardship, or even death.