In Comparing Vibrational and Rotational Levels in Molecules, We Find

In comparing vibrational and rotational levels in molecules, we find that the energy separation between adjacent energy levels is

A) the same in rotational and vibrational levels.
B) greater in rotational than in vibrational levels.
C) greater in vibrational than in rotational levels.
D) directly proportional with one rotational level for each vibrational level.
E) inversely proportional with one rotational level for each vibrational level.