A Single-Slit Diffraction Pattern Is Produced from a Light Source

A single-slit diffraction pattern is produced from a light source of wavelength 580 nm. The light goes through a single slit and onto a screen 1.0 m away. The first dark fringe is 5.8 mm from the central bright fringe. What is the slit width? (1 nm = 10 ^{- 9} m)

A) 0.12 mm
B) 0.24 mm
C) 0.081 mm
D) 0.10 mm