Tìm x biết x không chia hết 9, 21<=x<=28

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

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

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

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