The simplified value of $$\left[\frac{\sin^2 25^\circ + \sin^2 65^\circ}{\cos^2 24^\circ + \cos^2 66^\circ} + \sin^2 71^\circ + \cos 71^\circ \sin 19^\circ\right]$$ is:

A

1

B

0

C

3

D

2