How did the Louisiana Purchase impact U. S. expansion? A. It quadrupled the size of the United States and created an alliance with France
B. It doubled the size of the United States and secured access to foreign markets.
C. It allowed access to the Pacific Coast, which increased foreign trade.
D. It allowed access to the Great Lakes, which strengthened Northern industries.

B

Explanation:

The Louisiana Purchase was one of the greatest milestones in Westward Expansion. It Doubled the size of the United States, added 14 states to the Union, and greatly expanded the United States boundaries. ... Also the Americans trade and commerce would majorly slow because the Port of New Orleans would belong to the French.

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