The answer is B. Hope this helped!
Since a common noun is the opposite of a proper........you cant really change it to a common because it is not a common noun and will never be.Period.
Answer: This suffix changes the meaning of the word quick by making it past-tense instead of present-tense.
Explanation: In a story, writers are more likely to say quick-ly because it happened already, but in present-tense, you say "quick" because it is in the present.