John is thinking of starting a new business. After analyzing the data, he comes up with the following Cost and Revenue functions: C(x) = 90x + 720 and R(x) = 130x Find the break-even quantity and the Profit function. The break-even quantity is O A. 8 units O B. -18 units O C. 18 units O D. -8 units The Profit function is O A P(x) =40x + 720 O B. P(x) = 40x - 720 O C. P(x) = 220x +720 O D. P(x) = -40x + 720