The values of the integrals\(\mathop \smallint \limits_0^1 \left( {\mathop \smallint \limits_0^1 \frac{{x - y}}{{\left( {{{\left( {x + y} \right)}^3}} \right)}}dy} \right)dx\) and\(\mathop \smallint \limits_0^1 \left( {\mathop \smallint \limits_0^1 \frac{{x - y}}{{{{\left( {x + y} \right)}^3}}}dx} \right)dy\) are

• A. same and equal to 0.5
• B. same and equal to -0.5
• C. 0.5 and -0.5, respectively
• D. -0.5 and 0.5, respectively