The traditional treatment of strep infections has been a seven-day course of antibiotics, either penicillin or erythromycin. However, since many patients stop taking those drugs within three days, reinfection is common in cases where those drugs are prescribed. A new antibiotic requires only a three-day course of treatment. Therefore, reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed.
Which of the following, if true, most strengthens the argument?
The passages discusses about treatment of strep infections. Comparison between new antibiotics and 2 old ones. Conclusion: The new antibiotics requires shorter course (3 days) - new antibiotics is superior, with less chance of reinfection. But what if the new antibiotics is not as effective as the other 2 old antibiotics? (a logic gap)
C is irrelevant: we are discussing strep only. E fills the gap mentioned above: new antibiotics is no less effective.