The correct answer is A. equal.
A uniform pay scale is one in which all employees are paid the same amount for the same job. This means that there is no difference in pay based on factors such as experience, education, or performance. A uniform pay scale can help to ensure that all employees are treated fairly and that there is no discrimination in the workplace.
Option B, different, is incorrect because a uniform pay scale does not allow for differences in pay. Option C, opposite, is incorrect because a uniform pay scale does not allow for opposite pay. Option D, varied, is incorrect because a uniform pay scale does not allow for varied pay.