The volume of oil in four different containers is shown below:
 Container A: 5.25 milliliters
 Container B: 5.29 milliliters
 Container C: 5.27 milliliters
 Container D: 5.23 milliliters
 Sue has a measuring cup that can measure to the nearest tenth of a milliliter. If Sue measures the oil in each container, the least amount of oil would measure ____ milliliters.