D.
The rest seem wrong.
It could be B though
Answer:
The first people migrated to America at the end of the last ice age because sea levels decreased from the massive glaciers providing a temporary bridge (Bering Land Bridge) connecting the old world and the new world. Scientists and Anthropologists predict this event occurred after 12,600 BP approximately 20,000 years ago
Explanation:
Over time this answer could change as newer technology and innovations are seen yearly.
A corduroy road<span> or </span>log road<span> is a type of </span>road made by placing logs<span>, perpendicular to the direction of the </span>road<span> over a low or swampy area. The result is an improvement over impassable mud or dirt </span>roads<span>, yet rough in the best of conditions and a hazard to horses due to shifting loose </span>logs<span>.</span>
