Diffraction Grating: a Diffraction Grating Has 450 Lines Per Mm

Multiple Choice

Diffraction grating: A diffraction grating has 450 lines per mm. What is the highest order m that contains the entire visible spectrum from 400 nm to 700 nm?

A) m = 2
B) m = 3
C) m = 4
D) m = 5
E) m = 6