A Sustainable Competitive Advantage for a Firm Refers To

A sustainable competitive advantage for a firm refers to:

A) an advantage that a firm possesses as a result of being first in a particular market.
B) an advantage that a firm possesses for a short period of time, till a competitor replicates it.
C) an advantage that is not easily copied and thus can be maintained over a long period of time.
D) an advantage companies possess by being already established in a market.
E) an advantage that a firm has as a result of its ability to produce goods at a lower cost than its competitors.