Consumer advocate: There is no doubt that the government is responsible for the increased cost of gasoline, because the government' s policies have significantly increased consumer demand for fuel, and as a result of increasing demand, the price of gasoline has risen steadily. Which one of the following is an assumption required by the consumer advocate's argument? ['If the government pursues policies that do not increase the demand for fuel, gasoline prices tend to remain stable.', 'The government has an obligation to ensure that demand for fuel does not increase excessively.', 'The government can bear responsibility for that which it indirectly causes.', 'Consumer demand for gasoline cannot increase without causing gasoline prices to increase.']