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
  $\alpha_3 < \alpha_1 < \alpha_2$