For the following single-slit diffraction experiments, consider the angle from the center of the diffraction pattern to the first dark fringe. Which one gives rise to the largest angle?
选项：

A:Wavelength 400 nm, slit width 0.20 mm. ;
B:Wavelength 600 nm, slit width 0.20 mm.;
C:Wavelength 400 nm, slit width 0.30 mm.;
D:Wavelength 600 nm, slit width 0.30 mm.