In the picture we can see one whole square and 1/4 of a whole square shaded this means that 1 1/4 or 5/4 would be appropriate answers but it says that you are trying to find a appropriate mixed number. A mixed number is a number that includes a whole number and a fraction. For example, 3 1/3 is a mixed number. This means that it can't be 5/4 because it doesn't include a whole number leaving 1 1/4. So, 1 1/4 or D would be correct.
