Tìm tâp xác định D của hàm số y = tan(2x+pi/3)

A. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{2}|k\in \mathrm{\mathbb{Z}}\right\}$

B. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{6}+k\mathrm{\pi }|k\in \mathrm{\mathbb{Z}}\right\}$

C. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{12}+k\mathrm{\pi }|k\in \mathrm{\mathbb{Z}}\right\}$

D. $D=\mathrm{ℝ}\backslash \left\{-\frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2}|k\in \mathrm{\mathbb{Z}}\right\}$