Final answer:
The traditional sources of competitive advantage are cost, innovation, quality, and marketing. However, marketing is the exception as it is not a traditional source of competitive advantage.
Step-by-step explanation:
All of the following were traditional sources of competitive advantage except:
- Cost: Having lower costs than competitors by controlling expenses and improving efficiency.
- Innovation: Developing new and unique products, services, or processes that differentiate the company from its competitors.
- Marketing: Effectively promoting and communicating the value of the company's products or services to customers.
- Quality: Delivering products or services that meet or exceed customer expectations.
Therefore, the correct answer is c) Marketing, as it is a traditional source of competitive advantage.