An increase in the market demand for gasoline in the present, all else equal, could be caused by
a) a rise in peoples’ income.
b) a reduction in the price of the gasoline.
c) an expected price decrease in the near future.
d) a reduction in the cost of drilling and refining petroleum.

A. a rise in peoples' income

Explanation:

The question tries to trick you. At first glance you suspect all the answers are correct but if you reread the question, you find the key term to be "ALL ELSE EQUAL". This implies that nothing about the gasoline changes. This eliminates options B and D and leaves you with A and C. From here it kind of seems like anybody's guess but C doesn't make any sense. If the price is expected to drop in the near future, consumers would buy less or wait for the price to drop rather than demanding more. I also took the quiz but I want you to have the explanation that I came up with.

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