Choose the correct answer in $\int e^x\sec x(1+\tan x)\;dx$ equals

Question

$$\begin{array}{1 1}(A)\;e^x\cos x+C\qquad(B)\;e^x\sec x+C\\(C)\;e^x\sin x+C\qquad(D)\;e^x\tan x+C\end{array}$$