[单选题]
White light is spread out into spectral hues by iknitw.5 //uea grativq:uk6 ld uf gs +./cy(aym0,hng. If the grating has 2000 lines per centimeter, at what angle w (6d,afuyc +0qhlugv. /:kms yill red light (640 nm) appear in the first order?
A. $3.57^{\circ}$
B. $7.35^{\circ}$
C. $11.2^{\circ}$
D. $13.4^{\circ}$
