Which of the Following Is Not a Potential Advantage of Backward

Which of the following is not a potential advantage of backward vertical integration?

A) The increase in a company's differentiation capabilities and the possibility of a differentiation-based competitive advantage
B) Reduced vulnerability to powerful suppliers (who may be inclined to raise prices at every opportunity)
C) Reduced costs
D) Reduced risks of disruptions in obtaining crucial components or support services
E) Reduced business risk because of controlling a bigger portion of the overall industry value chain