What is the definition of Price Elasticity of Supply (PES)? a. The responsiveness of the quantity demanded of a good or service to a change in its price, holding all other factors constant. Ob. The responsiveness of producer income to a change in the price of a good or service. O c. The responsiveness of the quantity supplied of a good or service to a change in its price, holding all other factors constant. O d. None of the options