The correct answer is (C).
The answer is D. All of the other claims focus on giving the students an easier time at the expense of the school, while answer D makes the argument that it would benefit the school.
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"
