二次积分 $I=\int_{-1}^0 \mathrm{~d} x \int_{-1}^x\left[\cos \left(y^2\right)+x^2 \sin (x+y)\right] \mathrm{d} y+\int_0^1 \mathrm{~d} x \int_x^1\left[\cos \left(y^2\right)+x^2 \sin (x+y)\right] \mathrm{d} y =$
$\text{A.}$
$\text{B.}$
$\text{C.}$
$\text{D.}$
$\text{E.}$
$\text{F.}$