벡터함수 $F (x, y) = \left (x^ {2} +2 x-y, y^ {2} +x+2 y \right)$ 를 곡선 $C: r (t) = (\cos t, \sin t), 0 \leq t \leq 2 \pi$ 를 따라 선적분한 값은?

• ①$- \pi$
• ②$0$
• ③$\pi$
• ④$2 \pi$