Zone Diameter Interpretation Examine the zone diameter data in the table. Choose the statement that represents a valid conclusion from these data. a. Pseudomonas is less susceptible to carbenicillin than E. coli . b. The relative susceptibility of these two organisms cannot be determined from these data. c. Pseudomonas and E. coli are equally susceptible to carbenicillin. d. Pseudomonas is more susceptible to carbenicillin than E. coli . I tried selecting answer choice A, but it was wrong... .