Critical Reasoning (CR) | Re: Sammy: For my arthritis, I am going to try my aunt's diet: large amoun

I have a doubt on choice C asit says that arthritis gets worse overtime , however, we can infer from the stimulus that both Sammy’s aunt and Pat’s brother improved the condition sometimes, Pat’s brother even got worse at first, then improved at the same time he gave up on the vegetable, and that means choice C goes against the stimulus, hence it’s wrong.
Can someone clarify this ? Thanks


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