Wart-Gone cream is a well-known cure for reducing the spread of painful warts. A dime size amount rubbed on the infected area daily is the prescribed dosage, and applying the cream more often does not enhance the cream' s healing effects. Hence, distributing coupons giving $3. 00 off the price of Wart-Gone will not boost sales and, ttherefore, will not increase profits either. Which one of the following statements, if true, would most strengthen the argument? ['The $3. 00 coupons, if distributed, would not induce new customers, who might not have purchased the product otherwise, to try Wart-Gone.', 'Wart-Gone has proven to be more effective on certain types of warts than others.', 'Warts, though all caused by a virus, differ greatly in shape and appearance.', 'Wart-Gone can be produced in small or large batches without appreciably lowering the pre-tube production costs.']