[单选题]
When light illuminates a grating w8:h w.o ,kla; n,,wh0h* obcaln ,ajzoith 7000 lines per ci0ci k ga7xj e.p tl*ztqg99z ms/1e):entimeter, its second order maxi0*l: z meg qetcgs)i/ia.9xz79 p jk1tmum is at $62.4^{\circ}$. What is the wavelength of the light?
A. $336 \; nm$
B. $363 \; nm$
C. $633 \; nm$
D. $752 \; nm$
