Amy is doing a science experiment on how a certain bacterium reacts to an antibiotic. She has 3 dishes of identical bacterium samples with 20 bacteria in each dish. She gives an antibiotic to all of the bacteria in one dish. All of the treated bacteria died, and the bacteria in the other two dishes survived. Identify the sample in the situation above. A. all bacteria everywhere B. the antibiotic C. all the bacteria in the treated dish D. all the bacteria in all 3 dishes

In the context of Amy's science experiment, the sample refers to the specific group of bacteria that is being tested or observed in relation to the antibiotic treatment. Let's analyze the options: A. **All bacteria everywhere** - This is too broad and does not specifically refer to the bacteria being tested in the experiment. B. **The antibiotic** - This is the treatment being applied, not the sample of bacteria. C. **All the bacteria in the treated dish** - This option specifically refers to the bacteria that were exposed to the antibiotic, which is the focus of the experiment. D. **All the bacteria in all 3 dishes** - This includes both the treated and untreated bacteria, which is not the specific sample being tested. Based on this analysis, the correct answer is: **C. all the bacteria in the treated dish**.