Which of the Following Statements Is True About Competitive Advantage

Which of the following statements is true about competitive advantage?

A) It is unaffected by the strategies taken by the company.
B) It is considered to be sustained when it lasts for three months.
C) It exists only when the company's profitability is greater than the ten highest grossing firms in the world.
D) It exists only when the company's profitability is greater than the average profitability and profit growth of its rivals.
E) It is seldom affected by the business model of the company.