Let $$z_1$$ and $$z_2$$ be two district complex numbers and let $$z = (1 - t)z_1 + tz_2$$ for some real number t with 0 < t 1. If Arg(w) denotes the principal argument of a nonzero complex number w, then

A

$$\mid z - z_1\mid + \mid z - z_2\mid = \mid z_1 - z_2\mid$$

B

$$Arg(z - z_1) = Arg(z - z_2)$$

C

D

$$Arg(z - z_1) = Arg(z_2 - z_1)$$