The marginal social cost of pollution rises as the quantity of pollution emissions:

A) remains constant.
B) falls.
C) rises.
D) rises but subsequently gradually falls.

The marginal social cost of pollution refers to the additional cost imposed on society by an increase in pollution emissions. As the quantity of pollution emissions rises, the negative impact on the environment and public health also increases, resulting in higher costs to society. Therefore, the marginal social cost of pollution rises as pollution emissions increase.