Tìm x biết 

Câu hỏi: Tìm x biết $x⋮3, x không ⋮9, 20<x<30$

A. $x\in \left\{23, 24, 25, 26, 27, 28, 29\right\}$

B. $x\in \left\{21,22, 23, 24, 25, 26, 29\right\}$

C. $x\in \left\{21, 24\right\}$

D. $x\in \left\{21, 22, 23, 24, 25, 26, 27, 28, 29\right\}$