The Fourier transform of the signal ( frac{1}{a^2+w^2} ) is _____________

• A. ( frac{ }{a} e^{a| |} )
• B. ( frac{ }{a} e^{-a| |} )
• C. ( frac{2}{a} e^{-a| |} )
• D. ( frac{ }{a} e^{a| |} )