The marginal social benefit of reducing the later (or final) units of pollution come with which of the following? a. Significant marginal social benefits (it's expensive and the benefits are miniscule to reduce the later initial units of pollution) b. Minimal marginal social costs (it's cheap and the benefits are miniscule to reduce the later initial units of pollution) c. Significant marginal social costs (it's expensive and the benefits are miniscule to reduce the later initial units of pollution)