A is the answer to ur question
The answer is A because I had a question like that before.
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.
Answer:
easily; happily; angrily; slowly; quickly
Explanation:
In this case, you just add the suffix -ly to fill in the blanks! :)