Suppose That the Demand Curve for Desktop Computers Shifts Rightward

question 48

Multiple Choice

Suppose that the demand curve for desktop computers shifts rightward and at the same time the supply curve shifts leftward.Which of the following could have caused these shifts?

• A)Desktop computers are a normal good and incomes increased,while more firms entered the market.
• B)The price of a laptop computer,a substitute for desktop computers,fell and the cost of producing desktop computers decreased.
• C)Consumers purchased more computers because of the Christmas season and the labour costs of producing desktop computers decreased.
• D)Desktop computers are a normal good and incomes decreased,while the labour costs of producing personal computers increased.
• E)Desktop computers are a normal good and incomes increased,while the labour costs of producing personal computers increased.

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