Answer:
C, or 12
Explanation:
Well, we know that range is the highest number subtracted by the lowest number, so we must find the highest height of the toddler and subtract by the shortest toddler's height. To find out easily, let's order them by shortest to tallest:
63, 65, 66, 68, 69, 71, 71, 71, 72, 75
Subtract highest number by lowest number (height).
75 - 63 = 12
So the range of the toddler's height is 12.
Hope it helped! :)