The Letter $\mathrm{N}$ Is Symmetric (In the Sense Defined in This Chapter) for This

The letter $\mathrm{N}$ is symmetric (in the sense defined in this chapter) for rotations around an axis going through its center that points in which of the following directions?

A) $\rightarrow$
B) $\downarrow$
C) Perpendicular to the plane of the letter
D) A and C
E) A, B, and C