The answer is C. The reason why the answer is C, is because only one person can drive in one car at a time. This explains why the answer is not D. The reason why the answer is not B, is because only a thing can be called "the". Like, "the animal" or "the thing". The reason why the answer is not "there", is because the word "there" means in, at, or to that place or position. I hope this helps!