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$\int_{-1}^0 \mathrm{~d} x \int_{-x}^{2-x^2}(1-x y) \mathrm{d} y+\int_0^1 \mathrm{~d} x \int_x^{2-x^2}(1-x y) \mathrm{d} y=$
A. $\frac{5}{3}$     B. $\frac{5}{6}$     C. $\frac{7}{3}$     D. $\frac{7}{6}$         
不再提醒