This graduated cylinder has numbers representing milliliters. A student says that the volume of the liquid inside is 21.8 millileters. What best explains why the student is wrong?
A:21.8 is at the top of the meniscus, but volume should be measured in the middle of the meniscus.
B:21.8 is at the top of the meniscus, but volume should be measured at the bottom of the meniscus.
C: Since the lines are only marked with whole numbers, the students must round to a whole number.
D: since the whole numbers represent milliliters, the student must use a unit smaller than milliliters.