[单选题]
The frequency of a wave i el0o0*wlsgm: ncream(.p /.evfc8le , ycooses. What happens to the distance between successive crests if the speed remains lcc eo .evpo.f,/my8( constant?
A. It increases.
B. It remains the same.
C. It decreases.
D. It cannot be determined from the information given.
