An entrepreneur estimates his total profit (total revenue minus total cost) for his proposed company as p(x) = x^3 − 4x^2 + 5x − 20, where p is in hundreds of dollars and x is number of years the company has been in business. In which year (x) will the entrepreneur break even? A. year 1
B. year 2
C. year 3
D. year 4

D. year 4

I hope this helps.