[单选题]
For a diatomic quantum mechanic8wq(mpaf6f2 4meqp fvn un1:2 4n*)j kk- -c3baxqsk gal vibrator, the energy difference between adjacent quantum stat )4jgbkcs-kanx -*3qkes
A. increases as v increases.
B. decreases as v increases.
C. is constant for all values of v.
D. varies randomly as v increases.