To prevent the spread of any disease, it is necessary to administer medicines on time. A common fallacy among people is that medicine needs to be taken only till the symptoms go away. But it is possible that even though there are no symptoms, the bacteria are still present in the system. So, it's always better to take medicines for a longer time period than prescribed so as to ensure that bacteria are completely eliminated.Which of the following, if true, most weakens the argument?

• A Medicines have been developed against a wide range of bacteria.
• B Antibiotics do not work against viruses.
• C Overdosing of medicines can lead to bacteria getting resistant to that medicine.
• D Bacteria are the only disease-causing agents.
• E Doctors are always right in prescribing the dosage and duration of medicine.