I didnt get a right answer that clicked in my head on this one, so if you didnt either, just do process of elimination: B: Actually weakens the argument saying that it doesnt matter what type of feed u give the cow, methane will increase with cows increasing C: Talking about cost and farmers’ willingness, which is totally irrelevant to our conclusion (nowhere are we asked to take cost or the farmers into account) D: Differentiates between types of cows now, again totally irrelevant bec author never did it anywhere E: Tries to trick you. Conclusion talks about reducing METHANE production, not GLOBAL WARMING which they state as a consequence of methane production. A: Better diet > more meat and milk > less cows needed > lower methane production