Bacterial resistance to common antibiotics has been occurring over the last fifty years. Many antibiotics, like ampicillin, were effective in treating many bacterial infections but are not becoming significantly less effective. In order for a medical doctor to be able to explain to the patient why the same antibiotic can no longer be used to treat a similar infection, the doctor attempts to explain natural selection to the patient. Evaluate which of these components would be appropriate to include in the explanation to the patient and select all that apply.