The function $y=e^{-4x}$ is a solution to the differential equation:

1. A
   $\frac{d^{2}y}{d{x}^2}-3\frac{dy}{dx}-3y=0$
2. B
   $\frac{d^{2}y}{d{x}^2}+3\frac{dy}{dx}-4y=0$
3. C
   $\frac{d^{2}y}{d{x}^2}-3\frac{dy}{dx}-4y=0$
4. D
   $\frac{d^{2}y}{d{x}^2}-4\frac{dy}{dx}-4y=0$