The answer is A, because it has no errors.
B. The observers up front were asked to sit down so that the ones in the back could see. When you are talking about people, you use sit, not set.
The answer among the four choices is the third one, choice letter C.
When Louis Pasteur, a man who started out as a research chemist, let<span> nerve tissue from sick animals stand for a few days, the nerve tissue became weak.</span>
Answer: A is the best example of an internal rhyme.
Explanation: The reason being, is that the end of verse one, the word moth, rhymes with the last verse of line two, cloth. Basically moth and cloth rhyme, making it an internal rhyme.
