Which choice best explains why doctors now prescribe antibiotics less often than in the past?

The widespread use of antibiotics has created a frightening threat to our safety. While antibiotics have offered life-saving treatment for countless diseases, their misuse and overuse have contributed to the evolution of deadly bacteria that are resistant to treatment. Although there is a reluctance to give up the demand for antibiotics, most people accept scientists’ warnings of impending catastrophe.

Which choice best explains why doctors now prescribe antibiotics less often than in the past?
A . The newer antibiotics are too expensive for the average consumer.
B . Insurance does not cover many antibiotic prescriptions.
C . Antibiotic use causes frequent digestive upsets.
D . Time constraints prevent doctors from writing as many prescriptions.
E . Bacteria become resistant to treatment by certain antibiotics.

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Answer: E