Because he had become a Republican.
The conclusion that we can draw is that a. Twain believed the United States did not have a right to the territories it held overseas.
<h3>What were Twain's views on imperialism?</h3><h3 />
The relevant excerpt is not attached but the answer can be inferred based on Twain's historical views.
Mark Twain was against American imperialism and believed that the U.S. should not inflict upon others, what the British had inflicted on them.
He would therefore most likely believe that the U.S. did not have a right to the foreign lands it possessed.
Find out more on Mark Twain at brainly.com/question/11926015.
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I'm pretty sure its A. The collapse of Christianity.