Mark against the correct answer in the following:

Mark $(\sqrt{)}$ against the correct answer in the following:

The solution of the []DE $\frac{d y}{d x}=e^{x+y}$ is

A. $e^{x}+e^{y}=C$

B. $e^{x}-e^{-y}=C$

C. $e^{x}+e^{-y}=C$

D. None of these