Most pig excrement is simply spread on fields as fertilizer. This pig excrement smells and causes environmental damage. If the government banned the spreading of untreated pig excrement, which of the following would be true about the change to consumer surplus and producer surplus, respectively, in the pig market? (3) [Highlight the correct answer]

a. Up; Down.

b. Uncertain; Down.

c. Uncertain; Uncertain.

d. Down; Down.

e. Down; Uncertain.