[单选题]
For a diatomic quantum mechanicaptss2 glm2l /e6wk u7+l rotator, the ener8i(i x.fqi4lq+(c vq ugy difference between adjacenti(u48qilq+xc f. q(i v energy levels
A. increases as L increases.
B. decreases as L increases.
C. is constant for all L.
D. varies randomly as L increases.