An increase in the demand for gasoline today caused by concerns that gasoline prices will be higher tomorrow is most likely attributable to a change in:
income.
consumer preferences.
prices of other goods.
consumer expectations.

consumer expectations.

Explanation:

There will be change in the consumer expectations , since , according to the question , the consumers are sure that the price of the gasoline will increase tomorrow , hence to save some amount of money , they will start to buy gasoline , and thereby the demand for gasoline would increase and they would expect more gasoline .

Hence , The correct answer according to the data of the question is -  consumer expectations .

answerimplicit;

the answer is "b.the increased supply will create a surplus. "

the essential thought behind price controls is straightforward - utilize the power of law to modify the equilibrium of a market. for instance, the legislature may choose that the steel business needs to survive, and in this way pass a law to set a value floor on steel. this implies all steel sold must offer at or over the floor value, which must be set over the equilibrium cost for it to have any impact. the switch could likewise happen - the administration can choose that steel is excessively costly and set a value roof underneath its equilibrium value, with the goal that all steel must be sold at or beneath that ceiling.