The figure shows a timber column.

Design Code:

NDS: National Design Specification for Wood Construction with Commentary, $2018$ edition and National Design Specification Supplement, Design Values for Wood Construction, $2018$ edition.

Assuming dry service, normal temperature conditions, and $C_i=1\mathrm{.}00,$ the critical buckling design value $F_{cE}($psi$)$ using allowable stress design for the column is most nearly:

A$.150$

B$.350$

C$.475$

D$.500$