If the $\operatorname{Arg} z_1$ and $\operatorname{Arg} \overline{z_2}$ are $\frac{\pi}{3}$ and $\frac{\pi}{5}$ respectively,then the value of $\operatorname{Arg} z_1 + \operatorname{Arg} z_2$ is

  • A
    $\frac{11 \pi}{15}$
  • B
    $\frac{6 \pi}{15}$
  • C
    $\frac{2 \pi}{15}$
  • D
    $\frac{8 \pi}{15}$

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