Which of the following is not one of the five competitive​ forces? A.
the threat from potential entrants
B.
the bargaining power of buyers
C.
the bargaining power of suppliers
D.
the​ firm's ability to differentiate its product

Answerinterviewing there is no image showing, but i believe this is correct/// plz check first.good luck

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .