Which of the following statements goes against Porter's 5 forces model?

A) Industry profitability is largely determined by the 5 forces

B) Firms can manipulate the 5 forces to their advantage

C) Which of the forces is most important depends on which company in the industry you are considering

D) Government regulation is not part of the 5 forces

E) Firms need to careful balance the 5 forces to determine their threats and opportunities