I also picked A instead of B, and after reviewing this is what helped me, hopefully I’m correct lol

But B, like the explanation said, is almost a restatement of just the conclusion sentence, mirroring it. A seems attractive at first because it also ties in the support sentence, but the question stem is asking for MC only, not for the support too. Also, in the explanation they described A as a “rule,” like a successful action to increase productivity MUST require enhancing employee welfare, which the author doesn’t touch on in their MC, they mention employee harm as support, not the MC/rule. The way I looked at it with A is, an action could be made that enhances employee welfare but does not benefit the business as a whole, which pokes a hole in A’s argument, making it incorrect

I feel like this still isn’t a fully formed thought yet, so if anyone has any extra clarifying ideas please help lol