The option is b, I hope this helps you!
The correct answer among all the other choices is A. Austria. Great Britain and France feared war was eminent with the annexation of Austria. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer:
President Franklin D Roosevelt
Explanation:
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<h2>Here is your answer mate </h2>
The Louisiana Purchase eventually doubled the size of the United States, greatly strengthened the country materially and strategically, provided a powerful impetus to westward expansion, and confirmed the doctrine of implied powers of the federal Constitution.