The region of integration in is \(\mathop \smallint \limits_0^1 \mathop \smallint \limits_x^{\sqrt {2 - {x^2}} } \frac{x}{{\sqrt {{x^2} + {y^2}} }}dy\;dx\)

• A. x = 0; x = y; x2 + y2 = 2
• B. y = 0; y = x; x2 + y2 = 2
• C. x = 0; y = 0; x2 + y2 = 0
• D. x = 0; x + y = 0; x2 + y2 = 2