I'd say beautiful is too general and should be replaced.
From the excerpt, the point of view that was illustrated is that B. A conviction that slavery is a terrible violation of human rights.
<h3>What is a point of view?</h3>
It should be noted that the point of view simply means the way that the author or narrator feels about a particular topic.
In this case, the point of view that was illustrated is that conviction that slavery is a terrible violation of human rights. The narrator was simply stating that slavery is a bad act.
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C. Complex
People who volunteer <u>not only</u> help others -> a dependent clause
<u>but </u>they help themselves as well. -> an independent clause