Answer: Edgar Allan Poe was a dedicated writer who took his craft seriously. Over the length of his career, he wrote 20 short stories and over 50 poems.
C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.
#4 is the answer because it uses like or as and compares a day away to a spring tonic