I took this test a while ago, the correct answer is: A.
Hope this helps (please mark brainliest)
(っ^-^ )っ Hey There!
Answer (Westward Expansion) → Westward Expansion (1801-1861) Westward expansion began in earnest in 1803. Thomas Jefferson negotiated a treaty with France in which the United States paid France $15 million for the Louisiana Territory – 828,000 square miles of land west of the Mississippi River – effectively doubling the size of the young nation.
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Answer: The Center of powers shifted from Western Europe to the USA and the USSR
Explanation: