As the manager of a leading advertising agency, you are overseeing a critical project for a major client. During a project review meeting, one of your team members, Sarah, expresses concerns about the potential ethical consequences of the campaign on societal values and public perception. Sarah believes in the importance of upholding ethical standards in advertising and demands that her concerns be taken seriously. Which aspect of employee rights is most relevant to Sarah's actions?

a$.$The right to healthy and safe working conditions.

b$.$The right to freedom of conscience and speech.

c$.$The right to due process.$$

d$.$The right to freedom from discrimination.