An increase in the costs of resources or inputs of production would shift the

a. short-run aggregate supply curve rightward
b. long-run aggregate supply curve rightward
c. short-run aggregate supply curve leftward
d. long-run aggregate supply curve leftward

C. short-run aggregate supply curve leftward

Explanation:

When the cost of production or inputs of production increase the short run supply curve shifts left because the producers are now willing to sell less at the same price because it is more expensive for them to produce, so at every price the production decreases because of which the supply curve shifts left. The long run supply curve isn't affected by an increase in costs of resources because it is the potential of the economy and an increase in costs of does not change the potential of the economy.