Which of the Following Statements About Complementors Is True

Which of the following statements about complementors is true?

A) Their impact on industries was first recognized by Porter's Five Forces model.
B) They have little importance in high-technology industries.
C) They have the power to impact the sales of the industry to which they supply complement products.
D) They tend to increase the sales of the industry they are supplying complements to by producing fewer low-quality complement products.
E) They cannot gain enough power to extract profits from the industry to which they supply complement products.