Which of the following factors does not cause the production possibilities curve of a country to expand outward?

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Improvement in technological innovationGrowth in the number of workersExpansion of physical capital resourcesDecrease in the level of unemploymentEnhancement in natural resource availability

Explanation

Options A, B, and C represent factors that increase the productive capacity of an economy, thereby shifting the production possibilities frontier outward. However, a decrease in unemployment (Option D) means better utilization of existing resources but does not expand the frontier itself, as it does not increase the economy’s maximum production potential.