I'm pretty sure the answer is A: Allied Power Hope it helps
The Danube and Rhine rivers.
The mid-west region was most common in the 19th century
The correct answer is C) they trained British pilots in effective air support techniques.
<em>U.S. pilots contributed to the allied war effort in Europe during World War II in that they trained British pilots in effective air support techniques.
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Air warfare during World War II was a key element in the strategies and tactics of the battles that the Allied Forces and the Axis Powers fought. The United States Air Force and Great Britain army deployed air strategies for bombing raids over important targets in Germany such as its main cities. Air superiority was an important advantage to win the war in the air.
The other options of the question were, a) they carried out countless bombing raids over German cities, b) they sank ships carrying supplies to Britain, and d) they ferried retreating troops between Britain and Europe.
