[单选题]
When light illuminates0 xwnrkw)3hx/+3i oizx5-m uxj6kn 7q1sg i.ma grating with 7000 lines per centimeter, its second order maximum is at jng.1ik6q ms7 $62.4^{\circ}$. What is the wavelength of the light?
A. $336 \; nm$
B. $363 \; nm$
C. $633 \; nm$
D. $752 \; nm$
