Which of the following causes the short-run aggregate supply curve to shift to the right? O A. a decrease in the capital stock O B. a higher expected future price level O C. an increase in the expected price of an important natural resource O D. a positive technological change Which of the following causes the short-run aggregate supply curve to shift to the left? O A. a positive technological change O B. an increase in the expected price of an important natural resource O C. an increase in the labor force O D. an increase in productivity