A student solved this problem and said the answer was 4 miles. Dave is walking to the store 2 miles from his house. Dave has already walked 1 miles. How much farther does Dave have to walk? Is the student's answer reasonable? A. Yes, the answer is reasonable. B. No, the answer is not reasonable. It should be about mile. C. No, the answer is not reasonable. It should be a bit less than 2 miles. D. No, the answer is not reasonable. It should be a bit more than 5 miles.