I beleive the answer would be B: Buring fuel
Answer: One reason is because America had become more industrialized and became like number one in being industrialized this gave the US a advantage in how much goods they could make and sell to the world not only that in the early 20th century many wars broke out that left Europe in ruins this also gave the US another advantage since must industry in Europe was destroyed by the war this left the US last man standing in industry since none of the war reached the US
Explanation:
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.