When choosing test tubes for the experiment, you are asked to omit "any that have much larger or smaller inner diameter than the others". Based on the objective of the experiment, why do you think you are instructed to do this?

a)None of the Above

b)We are comparing solutions, so the level of liquid is important

c)We are comparing colors of liquid, so we don't want to reflections to interfere

d)We are comparing precipitates, so the level of ppt will be important.