Both countries were involved in a system if alliances.
Based on the evidence in <em>"The Progress of the World,"</em> the author's purpose is <u>D. To warn Americans</u> of the potential costs of war.
<h3>What is the progress of the world?</h3>
The progress of the world can be measured in the remarkable increase in global quality of life. One example of the progress of the world is documented by the "World Database of Happiness."
This database provides extensive lists of social, economic, and psychological factors that depict the remarkable progress that the world has recorded in the recent past, especially the technological advances.
Thus, the author's purpose is not to provide a scientific explanation for the explosion, turn American opinion against the Spanish, or mourn the loss of Maine and its crew, but it is to warn Americans of the <u>potential costs of war</u>.
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