Researchers measured the average antibiotic resistance (% of bacterial cells surviving) for four bacterial strains in a hospital: Strain I, 12%; II, 14%; III, 13%; IV, 64%. They concluded that Strain IV is anomalously resistant. The strongest support is ______
Which choice most logically completes the text using the data above?
- A
Strain I's 12% resistance.
- Bcheck_circle
the cluster of I, II, III at 12-14% versus Strain IV's 64%—about five times the cluster's resistance.
- C
the average resistance.
- D
Strain II's 14% resistance.
Explanation
"Anomalously resistant" requires showing IV stands far apart from a cluster. Choice B captures both the cluster and the 5x ratio.