By the end of the Spanish-American War:.
a) horses proved essential for the victory.
b) the American victory in the decisive battle at Santiago depended on assistance from German forces.
c) America finally settled the question of freedom of the seas.
d) more American soldiers had died from disease than battle.

The correct answer is D. By the end of the Spanish-American War, more American soldiers had died from disease than battle.

Explanation:

The Spanish-American War occurred in 1898. It began with the US attack on April 25 against the then-Spanish colony of Puerto Rico after the sinking of the USS Maine in Cuba, and ended on August 12, 1898, when the Spanish army in Manila surrendered.

Thus the United States took over the Spanish colonies of Puerto Rico, Cuba, and the Philippines.  

This war was the beginning of the United States pursuing foreign politics of expansion even in remote areas. Prior to this war the United States worked to expand its territory on the North American continent against indigenous peoples and against Mexico.

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