[单选题]
Light of wavelength 53sx,1 c/ugqsww,k4ik 80 nmpxic/ko+rj/ 6a2 vvd) is incident on a slit of width 0.300 mm. An observing screen iji2d/xk)rvc+p/6 va os placed 2.00 m from the slit. Find the position of the first order dark fringe from the center of the screen.
A. $0.26 \; mm$
B. $1.9 \; mm$
C. $3.9 \; mm$
D. $7.7 \; mm$
