Consumer advocate: The manufacturer' s instructions for assembling a product should be written in such a way that most consumers would find it much easier to put the product together if the instructions were available than if they were not. Which one of the following, if true, would provide the strongest reason for thinking that the principle advanced by the consumer advocate cannot always be followed? ["For the typical product, most consumers who assemble it do so very easily and without ever consulting the manufacturer's instructions.", 'Often the store at which a consumer purchases an unassembled product will offer, for a fee, to assemble the product and deliver it.', "The typical consumer who assembles a product does so using the manufacturer's instructions, but still has great difficulty.", "Usually a consumer who is trying to assemble a product using the manufacturer's instructions has no difficulty understanding the instructions."]