[单选题]
Which of the following is a p xawruxv8/ d29o os/n,gee;, false 4yo9iimenu h4u q4p9+statement?
A. All points on a given wave front have the same phase.
B. Rays are always perpendicular to wave fronts.
C. All wave fronts have the same amplitude.
D. The spacing between adjacent wave fronts is one-half wavelength.
