The revised pay scale is uniform.

Answer: Option D

Uniform : remaining the same in all cases and at all times; unchanging in form or character.
Equal : being the same in quantity, size, degree, or value.
Different : not the same as another or each other; unlike in nature, form, or quality.
Opposite : situated on the other or further side when seen from a specified or implicit viewpoint; facing.
Varied : incorporating a number of different types or elements; showing variation or variety.

Antonym of Uniform is Varied