GMAT Critical Reasoning (CR) | Re: Manufacturers of mechanical pencils make most of the profit

Manufacturers of mechanical pencils make most of the profit on pencil leads rather than on the pencils themselves. The Write Company, which cannot sell its leads as cheaply as other manufacturers can, plans to alter the design of its mechanical pencil so that it will accept only a new designed Write Company lead, which will be sold at the same price as the Write Company's current lead.

Which of the following, if true, most strongly supports the Write Company's projection that its plan will lead
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