The best answer to go with is b
Manufacturing industries help in the war effort by providing military equipment for the war.
<u>Explanation:</u>
The industries which were manufacturing industries were very important for the war in the United States of America. The reason for this is that the industries were used to provide the military equipment which were to be used in the war by the military men. The manufacturing industries provided around 297000 aircraft, 86000 tanks, trucks, many artillery pieces for the war.
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Answer: Concert of Europe, in the post-Napoleonic era, the vague consensus among the European monarchies favouring preservation of the territorial and political status quo. The term assumed the responsibility and right of the great powers to intervene and impose their collective will on states threatened by internal rebellion.
Explanation:
