曲线 C: x = cos ⁡ θ

题文

曲线 C: $\{\begin{matrix} x = \cos θ - 1 . \\ y = \sin θ + 1 \end{matrix}$ ( $θ$ 为参数)的普通方程为（）

A．	${(x - 1)}^{2} + {(y + 1)}^{2} = 1$	B．	${(x + 1)}^{2} + {(y + 1)}^{2} = 1$
C．	${(x + 1)}^{2} + {(y - 1)}^{2} = 1$	D．	${(x - 1)}^{2} + {(y - 1)}^{2} = 1$

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曲线 C: x = cos ⁡ θ - 1 . y = si