Answer:
Mostly by D. Overland trails
Explanation:
The oregon trail was the most popular, and were travelled by thousands if not more people by wagon.
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Lieutenant Colonel James Harold "Jimmy" Doolittle led the Doolittle raid in 1942. the Doolittle Raid (also known as the Tokyo raid) was an air raid by the US.
The answer would be D, ruled by a small group.
The answer to that question is A