Based on the information given, the relative size of our samples is D. We should take the same size sample from each school.
It should be noted that sampling simply means the selection of a subset of individuals from a population to estimate the population characteristics.
From the complete question, the relative size of our samples from each school if we want the two sampling distributions to have approximately the same standard deviation will be that we should take the same size sample from each school.
Learn more about sampling on:
https://brainly.com/question/17831271