PT33.S3.Q20 - galanin is a protein

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I'm redoing some questions that I marked when I first went through the ciriculum, and I came across this tricky one. I fully see why answer D is correct, but I can't figure out what makes B incorrect. Doesn't answer B deny an alternate cause?

Link: https://7sage.com/lsat_explanations/lsat-33-section-3-question-20

This is a strengthen question.

G is a protein in the brain. In an experiment, rats that preferred fatty foods over lean foods had a lot more G in the brain than did the rats that preferred lean foods over fatty foods. Therefore, G causes rats to crave fatty foods.

What I am looking for: This is a cookie cutter causal flaw. In my mind, a plausible weakener would be that eating fatty foods might cause an increase in G. We need to deny this.

Answer A: OK, so sometimes the rats choose lean foods. So what? Our facts say that the rats "consistently" choose fatty foods. Is this answer choice just sort of restatement of one of our facts? I think it is.

Answer B: This is hard to eliminate, and I think it's wrong because it just isn't relevant. We don't care about the fat in the brain, but rather, a protein in the brain. Part of me still thinks this denies an alternate cause though: the rats didn't prefer the fatty foods due to a fatty brain.

Answer C: So what? We only care about G in the brain, not the food. For this to work, I think you need to assume that the G in the food then goes up to the brain, but that's a weird assumption.

Answer This is perfect since it tells us that the rats that like fatty food had higher amounts of G in their brain before they ate the food. This denies that reverse cause scenario that I anticipated.

Answer E: So what? We don't know anything about the efficiency of metabolizing fat.

noobie1

B is what I consider to be a mishmash of words. The plausibility of a fatty brain causing fatty food craving is extremely low. That's like saying an oniony brain causes onion cravings.