Which of the Following Statements About the Sources of Competitive

Which of the following statements about the sources of competitive advantage is true?

A) The best companies choose one source of competitive advantage and perfect it.
B) Managing the sources of competitive advantage is a zero-sum game where one source improves at the expense of the other.
C) It is possible to improve quality and also enhance speed.
D) Outsourcing certain functions is likely to decrease innovation.
E) The faster the product is provided, the more innovation suffers.