Critical Reasoning (CR) | Re: Unlike the wholesale price of raw wool, the wholesale price

I was a bit skeptical about answer.
I am working in Retail sector, I can assure you that If the harvesting costs plummet, the cost of raw materials brought by Manufacturing industries governed by retail sectors also plummet. Thereby, The cost of clothing will not as much affected as mentioned by the stimulus.GMATNinja ,abhimahna , Can you please help me out here. Since it is a GMAT official question, I want to correct my way of approach. Please guide me.

Thank you
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