The diagram illustrates one method used to test the effect of an antibiotic on bacteria. The table gives the results from testing five different types of bacteria. Zones smaller than $13\ \text{mm}$ indicate that resistant bacteria are present. Which statement can be supported by these data?
- ABacteria become more resistant to antibiotics over time.
- BOnly types 2, 3 and 4 of the bacteria show resistance to the antibiotic.
- CThe antibiotic can be used to treat all the types of bacteria.
- DType 5 of the bacteria can never become resistant to the antibiotic.