Hot dogs and hot dog buns are complements. An increase in the price of flour used to make hot dogs buns will

a. increase consumer surplus in the market for hot dog buns and decrease producer surplus in the market for hot dogs.
b. increase consumer surplus in the market for hot dogs and increase producer surplus in the market for hot dog buns.
c. decrease consumer surplus in the market for hot dog buns and increase producer surplus in the market for hot dogs.
d. decrease consumer surplus in the market for hot dog buns and decrease producer surplus in the market for hot dogs.

d