A-A+
How did groups migrate into the Great Plains？A
问题详情
How did groups migrate into the Great Plains？
A．By walking on a corridor covered with ice
B．By using the path that big game had made
C．By detouring around a huge ice sheet
D．By following a mountain trail请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：... glacial melting created an ice-free corridor along the eastern front range of the Rocky Mountains. Soon hunters... had reached the Great Plains." Choices A and C are not correct because the corridor was ice-free. Choice B is not correct because the hunters were looking for big game, but the game did not leave a migration path.
