Final answer:
A sustainable competitive advantage is achieved by attracting a significant number of buyers with lasting reasons to purchase a company's products or services, despite customers' efforts to overcome those reasons. This can be achieved through various strategies such as offering lower prices, higher quality products, or superior customer service.
Step-by-step explanation:
Sustainable competitive advantage is achieved when actions or elements in a strategy attract a significant number of buyers with lasting reasons to purchase a company's products or services despite customers' efforts to nullify or overcome those reasons. This can be achieved through charging a lower price than rivals in the long-term, developing a product or service of higher quality than what rivals are offering, or creating a business model that enables the company to earn bigger profits per unit sold than rivals. Additionally, providing the very best possible customer service can help maintain a sustainable competitive advantage.