C should be the correct answer
D) Subject is the element necessary to complete the sentence above.
You already have a predicate (drives), so you don't need that, or a subordinate/independent clause. What you do need is a subject. For example:
<em>Mercedes </em>drives like no other car.
1(In my opinion being good shouldn’t have to be a learned behavior you should already be it
2(if I saw a man in a well I would help him
