Japanese producers of a type of microchip offered such low prices that U.S. producers of the chip were driven out of business. As the number of producers decreased,

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a. the market supply of microchips increased—

that is, the supply curve shifted to the right.

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b. the market supply of microchips increased—
that is, the supply curve shifted to the left.
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c. the market supply of microchips decreased—
that is, the supply curve shifted to the right.
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d. the market supply of microchips decreased—
that is, the supply curve shifted to the left.
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e. there was no change in the supply of microchips.
(This event is represented by a movement from one point to another on the same supply curve.)