Central Ideas and Details

SAT Reading and Writing· difficulty 3/5

The Lewis and Clark expedition (1804–1806) is often celebrated for its geographic discoveries, but recent histories emphasize that the explorers depended heavily on Indigenous knowledge to survive and succeed. Sacagawea, the Shoshone interpreter, is the best-known example, but Mandan, Hidatsa, and Nez Perce communities also provided food, shelter, and crucial geographic information.

Which choice best states the main idea of the text?

  • A

    Recent histories highlight the substantial Indigenous contributions to the Lewis and Clark expedition's success.

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  • B

    Lewis and Clark made important geographic discoveries.

  • C

    The expedition lasted from 1804 to 1806.

  • D

    Sacagawea was the most important member of the Lewis and Clark expedition.

Explanation

The passage corrects the celebratory frame to highlight Indigenous contributions — B. A is too narrow; C and D are background.

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