Drivers in the country of Holston want highway tolls eliminated. The cost of maintaining the highways is paid entirely out of revenue from the highway tolls. Holston must maintain its highways. Thus, it follows that if the tolls are eliminated, then the entire cost of maintaining the highways will have to be paid for by an increase in general taxes. Which one of the following is an assumption made by the argument? ['The amount of money saved by eliminating the costs associated with toll collection would not be available to pay part of the total cost of maintaining the highways.', 'The total cost of maintaining the highways will be less if the highway tolls rather than the general taxes pay for the maintenance.', 'If the highway tolls are not eliminated, there will be no need to increase the general taxes.', 'If the highway tolls are eliminated and the general taxes are increased to pay for maintaining the highways, there will be less emphasis on preventive maintenance.']