Answer:formal argument is stating the facts and giving details about your argument.
Explanation:
In A: it should be "I was" not "I were".
In B: it should be "lately you appear" not "you appears"
in C: this is correct! the subject is in agreement with the verb, and this is the correct answer.
in D: it should be "you are"
objectivity
hope this helps:)sorry if it doesnt