Formal should be the answer. It seems most appropriate.
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.
B because i look it up and this is the answer i got
The Continental Army persevered and won a decisive victory at the Battle of Saratoga. They decimated Burgoyne's troops, cut off supply routes, and Burgoyne never received his promised and desperately needed reinforcements.