How would the numbers -40, 0, and 40 appear on a horizontal number line?
A. O on the left end, -40 in the middle, and 40 on the right end
B. O on the left end, and both 40 and -40 on the right end
C. 40 on the left end, 0 in the middle, and -40 on the right end
D. -40 on the left end, 0 in the middle, and 40 on the right end