A biased sample is best described by:
C. The sample does not accurately represent the population.
It is a common statistics practice, when we want to study something from a population, we find a sample, which is a group of members of this population. The sample has to be representative of the population, that is, it has to involve all of it's groups. If it does not involve all the groups, it is not an accurate representation of the population, and is called biased, hence option C is correct.
More can be learned about sampling at https://brainly.com/question/25122507