Let $$f(t) = \sin^2 t,$$ find the Laplace transform of f(t)

A

$$\frac {2}{s^2 + 4}$$

B

$$\frac {2}{s(s^2 + 4)}$$

C

$$\frac {2s}{s^2 + 4}$$

D

$$\frac {2}{s(s^2 - 4)}$$