If you wanted to study the subject of fresh water scarcity as a complex whole, you should

a. Consult only the natural science disciplines of Earth science, biology, and
chemistry.
b. Consult only the interdiscipline of environmental studies.
c. Consult the relevant disciplines in the social sciences as well as those in the
natural sciences.

c. Consult the relevant disciplines in the social sciences as well as those in the
natural sciences.