Critical Reasoning (CR) | Asthma, a chronic breathing disorder, is significantly more common tod

IMO, none of the options give a conclusive answer.

If the phrase 'Until a few years ago' were removed from option D, then it would have been the correct answer. The insertion of 'until a few years ago' indicates that it is not being prescribed in the present age, which could further create a doubt as to whether the original prescription was faulty and ,thus, not used anymore.

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