[单选题]
Light of wavelength 580 nm is incidv2-97uj f4tlumqj - 3yonf: zient on a slit of widzp 8 rwwo,6 kd(z0vmq5th 0.300 mm. An observing scr vd8m5w6,rzkqp ( 0wzoeen is placed 2.00 m from the slit. Find the width of the central maximum.
A. $0.26 \; mm$
B. $1.9 \; mm$
C. $3.9 \; mm$
D. $7.7 \; mm$
