On May 4, 015, the Ministry of Finance and the State Administration of Taxation issued a document that the tobacco consumption tax was increased from 5% to 11%, and a specific tax was levied. Some experts believe that "tax-price linkage" will increase the price of cigarettes with the tax rate. When it is increased, the number of people who buy cigarettes will be reduced. From a tobacco control perspective, this is undoubtedly a good thing. Which of the following, if true, would most weaken the conclusion:. ['If the output is not affected by the selling price.', 'Increased income levels make people less sensitive to the price of cigarettes.', 'The tobacco excise tax rate in most countries in the world is less than 11%.', 'Some developed countries have experienced the proliferation of private cigarettes after increasing tobacco consumption taxes.']