This graduated cylinder has numbers representing milliliters. A student says that the volume of the liquid inside is 21.8 milliliters.

What best explains why the student is wrong?

21.8 is at the top of the meniscus, but volume should be measured in the middle of the meniscus.

21.8 is at the top of the meniscus, but volume should be measured at the bottom of the meniscus.

Since the lines are only marked with whole numbers, the student must round to a whole number.

Since the whole numbers represent milliliters, the student must use a unit smaller than milliliters.