The correct answer is D. The principle of equal treatment should be implemented.
The phrase “what is sauce for the goose is sauce for the gander” means that the same rules should apply to everyone, regardless of their gender. In the context of the question, this means that women should be paid the same as men when they do the same job.
Option A is incorrect because it does not address the issue of gender equality. Option B is incorrect because it is not clear what the “sauce” refers to. Option C is incorrect because it does not address the issue of equal pay.
The principle of equal treatment is important because it ensures that everyone is treated fairly. When women are paid the same as men for the same job, it shows that they are valued and respected. It also helps to close the gender pay gap, which is a significant problem in many countries.