Suppose people always consume gravy and biscuits together. What would you expect to happen to the equilibrium of biscuits if the price of gravy increases and meanwhile, a chef develops a new cooking method that makes the biscuits production process more efficient? O a. The equilibrium price will go up and the equilibrium quantity will go up. O b. The equilibrium price will be indeterminate and the equilibrium quantity will go down. O c. The equilibrium price will be indeterminate and the equilibrium quantity will go up. O d. The equilibrium price will go down and the equilibrium quantity will be indeterminate. O e. The equilibrium price will go up and the equilibrium quantity will be indeterminate