Find i(t) if $$I(s) = \frac{s + 1}{(s + 4)(s + 3)}:$$

A

$$3e^{-4t} - e^{-5t}$$

B

$$3e^{-4t} - 2e^{-3t}$$

C

$$2e^{-4t} - 5e^{-2t}$$

D

None of these