Answer: The option that is an example of a simple sentence is C. Animal testing is a cruel way to advance the progress of science.
Explanation: A simple sentence is a sentence that is made up of a single clause, that is to say it is a sentence that has one subject and one predicate. In that way, unlike complex sentences, simple sentences do not include dependent clauses.<u> Option C. is the only one among the options that has a single subject ("Animal testing") and a single predicate ("is a cruel way to advance the progress of science"); therefore, it is also the only simple sentence. </u>
