Which of the earth-system scientist's roles is best illustrated by this paragraph?

Suppose an electric-generating power plant is about to be built near your house. The local government has not decided whether to allow coal, nuclear, or oil as fuel for the plant (natural gas is not an option). Some groups argue coal is the best choice because there is a 200-year supply and using coal reduces our dependence on foreign oil. Critics argue that burning coal produces three times more global-warming gasses than oil. Coal also produces more dust and expels more acid-rain-causing gases than oil. Others argue that nuclear-generated power produces no greenhouse gases and no other atmospheric pollution. Critics argue that there is presently no long-term location to store the radioactive waste that will be generated and question the safety of nuclear power. Over the life of the plant, nuclear is the least expensive option, followed by coal and then oil.

A. Alerting public of natural hazards
B. Use of earth resources
C. Health of the environment
D. Informing society

Earth System science is the study of the environment that specializes in forecasting changes in the weather and climate, environmental hazards and mineral extraction. The roles of scientists who practice this field of science include:

Informing society: the above paragraph informs society, by outlining the options available for powering the plant, and comparing their benefits and disadvantages.

Alerting public of natural hazards: is concerned with discovery of natural hazards, monitoring these hazards and coming up with preventive strategies.

Use of earth resources and Health of the environment: explores how natural resources can be extracted with less impact on the environment and how to make the most efficient use of these resources.