The correct answer is D. Bacterial diseases respond to antibiotics, viral diseases do not.
Step-by-step explanation
Antibiotics are medications that are used to eliminate bacterial infections. Antibiotics kill or prevent the reproduction of bacteria. One of its main characteristics of antibiotics is that despite being potent, they do not fight infections caused by viruses, such as flu, colds or causes of cough and bronchitis. When antibiotics are taken against a virus, instead of a bacterium, greater damage can be caused instead of improvement, to counteract the action of viruses, it is necessary to use antiviral medications. Also, excessive use of these can cause bacteria to develop resistance to antibiotics and be more difficult to eliminate. So, the correct answer is D. Bacterial diseases respond to antibiotics, viral diseases do not.