如图,点O是正六边形的对称中心,如果用一副三角板的角,借助点O(使该角的顶点落在点O处),把这个正六边形的面积n等分,那么n的所有可能取值的个数是( )
A:4
B:5
C:6
D:7
I've read through this book several times,but I will read it so as to get better understanding.( )