The role of an assumption in an economic theory is to:

a. add realism
b. prove the theory
c. cover special cases
d. simplify the theory

The role of an assumption in an economic theory is to:

c. cover special cases.

Assumptions play a crucial role in economic theories as they provide a simplified framework within which economists can analyze and understand complex economic phenomena. These assumptions are deliberately made to simplify the real-world economic situation by omitting certain details and focusing on specific aspects that are relevant to the theory being analyzed.

By covering special cases, assumptions allow economists to isolate key variables and relationships to study specific economic phenomena. This enables economists to gain insights into economic behavior and generate predictions without being overwhelmed by the complexities of the real world.

It is important to note that assumptions are not meant to prove the theory or provide a complete representation of reality. Rather, they are tools used to simplify economic models and frameworks, making them more manageable and easier to analyze.

The incorporation of assumptions in economic theories also helps to establish clarity and consistency in economic analysis. Assumptions provide a foundation on which the theory is built, facilitating logical reasoning and allowing for the development of testable hypotheses.

Therefore, while assumptions in economic theories may not always capture the full realism of the real world, they are valuable tools for understanding and explaining economic concepts and phenomena.