[单选题]
For a diatomic quant--mmb9)d* oc4t qma zmum mechanicaxvgvjcs8: fag )yv:e +l*l,t *l vibrator, the energy difference between adjacent quantum statvllj:8 v,y * gvxge)t ca+:*fses
A. increases as v increases.
B. decreases as v increases.
C. is constant for all values of v.
D. varies randomly as v increases.