Final answer:
Cost leadership and differentiation, innovation and brand reputation, and technological expertise and exclusive contracts are aspects of competitive advantage that have major barriers to imitation.
Step-by-step explanation:
The aspects of competitive advantage that have major barriers to imitation are a. Cost Leadership and Differentiation, b. Innovation and Brand Reputation, and d. Technological Expertise and Exclusive Contracts. In cost leadership, a company achieves a competitive advantage by being able to produce goods or services at a lower cost than its competitors, making it difficult for other companies to replicate their cost structure. Differentiation involves offering unique products or services that are difficult to imitate, giving a company a competitive edge. Innovation and brand reputation also create barriers to imitation as companies that are known for their innovative products or have built a strong brand reputation are difficult to replicate by competitors. Finally, technological expertise and exclusive contracts can create barriers to imitation as specialized knowledge or exclusive agreements can limit the ability of competitors to replicate certain technologies or partnerships.