The value of $\int _ { - \frac { \pi } { 2 } } ^ { \frac { \pi } { 2 } } \frac { 12 ( 3 + [ x ] ) } { 3 + [ \sin x ] + [ \cos x ] } d x$ is equal to (A) $3 + 10 \pi$ (B) $11 \pi + 2$ (C) $10 \pi + 2$