"Two of the shop's metalsmiths become ill and are unable to come in to work," explains the shift.
A graph that displays the amount of production two items may achieve when the available resources are used effectively per unit of time is called a production possibilities curve or production possibilities frontier.
The production of both products increased when the graph shifted outward or to the right, whereas the production of both products decreased when the curve shifted inward or to the left. Option D is the only one of the available choices that would result in a reduction in both production rate and volume (resulting in an inward shift): "two of the shop's metalsmiths become ill and are unable to come in to work. "
Hence the correct answer is option D.
To learn more about production possibilities curve here:
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