David Thompson is best known for his extensive explorations and mapping of North America, particularly in the Canadian wilderness and parts of the northern United States. Among the options given, the most accurate statement related to his accomplishments is:
He followed the Lewis and Clark trail to the source of the Columbia River.
David Thompson explored the Columbia River and its tributaries, creating detailed maps and contributing significantly to the understanding of North America's geography, particularly the region now known as the Pacific Northwest. However, it's important to note that while he did travel in that vicinity, he did not follow the exact trail of Lewis and Clark, as Thompson conducted his explorations earlier in the early 1800s. The other options do not accurately represent Thompson’s achievements.
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