Answer: C. restores the correct balance between the “good” and “bad” bacteria
Explanation:
Understanding the Argument:
• Premise: The human microbiome, consisting of both “good” and “bad” bacteria, is essential to good health.
• Problem: Antibiotics indiscriminately kill both “good” and “bad” bacteria, which can disrupt the proper equilibrium necessary for health.
• Conclusion: After a course of antibiotics, a follow-up treatment is necessary to address this disruption.
The argument emphasizes that the core issue with antibiotics is their indiscriminate effect on the microbiome, disrupting the balance between “good” and “bad” bacteria. Therefore, the logical completion to the argument should address restoring this balance.
Analysing the Answer Choices:
• (A): bypasses the microbiome altogether• Incorrect. The argument focuses on the importance of the microbiome and restoring its balance, not bypassing it.
• (B): targets and eliminates only the “bad” bacteria• Incorrect. While this would be ideal during the antibiotic course, it does not address the restoration of balance after the antibiotics have been taken.
• (C): restores the correct balance between the “good” and “bad” bacteria• Correct. This directly addresses the issue described in the argument: antibiotics disrupt the balance in the microbiome, and the follow-up treatment should restore this balance.
• (D): purges the body of the remaining antibiotics completely• Incorrect. While removing leftover antibiotics might be useful, this does not address the disrupted bacterial balance caused by the antibiotics.
• (E): reverses any effects from the antibiotics• Incorrect. This is too vague and does not specifically address the need to restore the balance between “good” and “bad” bacteria. Also, if you reverse the effects, that means that you are putting the infection back in the body too. This is equivalent to killing all the bacteria that is causing the infections and then reversing this, meaning that you need to infect the person again.
Conclusion:
The best choice is C, as it logically completes the argument by addressing the need to restore the balance in the microbiome after a course of antibiotics.