If $\alpha_1, \alpha_2, \alpha_3$ respectively denote the moduli of the complex numbers $-i, \frac{1}{3}(1+i)$ and $-1+i$,then their increasing order is
- A$\alpha_1 < \alpha_2 < \alpha_3$
- B$\alpha_3 < \alpha_2 < \alpha_1$
- C$\alpha_2 < \alpha_1 < \alpha_3$
- D$\alpha_3 < \alpha_1 < \alpha_2$
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