C?

I'm always told to anticipate the answer choice if possible but the issue with that is that I often anticipate the wrong choice or something that never even shows up. For this question, I thought the problem was that the author believed the "health benefit," aka the soda tasting good, outweighed the risk of it causing allergic reactions so C was tempting for me. Is C problematic because the author isn't actually ignoring the health risks? He did acknowledge it could potentially cause allergic reactions.