Claim/Evidence/Reasoning (CER): We discovered that under certain environmental conditions, bacteria with one kind of variation tended to become more common in the population over time. Which kind(s) of bacteria was this and if a patient was infected by a population made up of 40 of this kind of bacteria, would they be as easy, as hard, or harder to eliminate with antibiotics as a population of the 40 bacteria you started with in Investigation 2, Trial B?