The reason for a persuasive essay is to convince the audience to your point, so if the audience is not convinced with you point then your persuasive writing is not good, if the audience is convinced, then your writing is good.
Answer: A; they are more accurate with their corrections
Explanation: when you use a red pen you circle what’s wrong, and not what’s write! Therefore, you make clearer corrections
The verb is past participle so that would be option A.