[单选题]
For a diatomic quantumcc 4kf :p/se)p mechanical vibrator, the energy differenc-9nyfjprf /)q +qp7jhgj 8-- zofzc6pe between adjacent quantum st c gfj/r-yz joq+89p76-pfpq j)fn-z hates
A. increases as v increases.
B. decreases as v increases.
C. is constant for all values of v.
D. varies randomly as v increases.