Monochromatic Light Is Normally Incident on a Diffraction Grating $\theta$ And Has Width W

Multiple Choice

Monochromatic light is normally incident on a diffraction grating.The m^th order line is at an angle of diffraction $\theta$ and has width w.A wide single slit is now placed in front of the grating and its width is then slowly reduced.As a result:

A) "both $\theta$ and w increase"
B) "both $\theta$ and w decrease"
C) " $\theta$ remains the same and w increases"
D) " $\theta$ remains the same and w decreases"
E) " $\theta$ decreases and w increases"