$$y = cx - c^2$$ is a general solution of the differential equation

A

$$\left(\frac {dy}{dx}\right)^2 - x \left(\frac {dy}{dx}\right) + y = 0$$

B

$$\frac {d^2 y}{dx^2} = 0$$

C

$$\frac {dy}{dx} = c $$

D

$$\frac {d^3 y}{dx^3} = 0$$