In Order for a Company to Achieve a Sustainable Competitive

In order for a company to achieve a sustainable competitive advantage, it must perform value chain activities:

A) at the same quality level as competitors, at the same cost.
B) at the same quality level as competitors, but at a lower cost.
C) at a higher quality level than competitors, at a higher cost.
D) at a higher quality level than competitors, but at no greater cost.
E) at either the same quality level as competitors, but at a lower cost, or at a higher quality level than competitors, but at no greater cost.