The marginal product of labor curve is the demand curve for labor

Which of the following is not a source of technological advancement for a producer?

A) more efficient physical capital B) outsourcing some aspect of production C) higher skill level of managers D) better trained workers

As the U.S. labor force grows and the nation's capital stock is augmented by investment, the

a. price level will rise. b. aggregate supply curve shifts inward. c. aggregate supply curve shifts outward. d. aggregate supply curve becomes steeper.