What is likely to occur if environmental regulations are too stringent?

a. The marginal social benefit of pollution reduction may outweigh the marginal social cost of pollution reduction.

b. The marginal social cost of pollution reduction may outweigh the marginal social benefit of pollution reduction.

c. The marginal social cost of pollution reduction will just equal the marginal social benefit from pollution reduction.

d. The marginal social benefit of pollution will become zero and pollution will increase dramatically.