What should an employer not do regarding lie detector tests according to state law?

The correct choice is that an employer should not request a lie detector test without prior notice. State laws typically require that employees or applicants be informed about the testing procedures and the reasons for the testing. This ensures transparency and allows individuals to understand the purpose of the test, thus respecting their rights. By giving prior notice, employers comply with legal standards designed to protect employees from potential abuse or misunderstanding of the testing process.

In the context of the other choices, employers are generally prohibited from conducting lie detector tests on all applicants due to restrictions meant to prevent discrimination and protect individual rights in hiring practices. While tests might be used in specific situations, such as during investigations of workplace theft, they cannot be applied universally to all applicants without cause. Regarding allowing employees to refuse tests, state law often mandates that employees should indeed have the right to refuse, which protects their autonomy and privacy rights.