One important function of county government would be "<span>C. running elections," since the other options from the list are either part of the job of federal government of state-sanctioned government bodies.</span>
The best and most correct answer among the choices provided by your question is the second choice or letter B.
The use of submarines during World War I had made <span>naval battles the key battles of the war.</span>
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The United States of America often sent troops to the nations of Latin American and often became involved in the debt problems of Latin America as a result of the Roosevelt Corollary.
The Roosevelt Corollary was an extension of a previous idea to the doctrine of Monroe. On the one hand, the main idea of Monroe's doctrine was to prevent European's intervention in the Western Hemisphere, on the other hand, Roosevelt corollary was practiced to explain America's invention throughout the Hemisphere. President Roosevelt issued his Corollary to ensure financial strength and to keep other powers outside the Hemisphere. This Corollary stated that all the debts of the Latin American countries would be pay off by the United States of America.