The resource-based model of the firm argues that
a. all resources have the potential to be the basis of sustainable competitive advantage.
b. resources alone can be a source of sustainable competitive advantage.
c. the key to competitive success is the structure of the industry in which the firm competes.
d. resources that are valuable, rare, costly to imitate, and non-substitutable form the basis of a firm's core competencies.
Answer: resources that are valuable, rare, costly to imitate, and non-substitutable form the basis of a firm's core competencies.