Choose the true statement. O A "pattern or practice of discrimination" case often involves statistical comparisons of the relevant labor market population (or other "job applicant pool") and the employer's work force. Under common law, at-will employment relationships were ones where the employee was free to quit at any time for any reason, and the employer could discharge the employee at any time for any reason. More recently courts have looked at public policy considerations in limiting the ability of an at-will employee to quit or be fired. Employees (or potential employees) with disabilities covered by the Americans with Disabilities Act (ADA) must be treated the same as non-disabled employees (or potential employees). For sexual harassment to exist, the harasser must be a boss or some type of superior. It is lawful for an employer to discharge an employee because that employee is about to become entitled to a bonus