Final answer:
The rights under employment-at-will include the ability of employees to quit their job at any time and the right of employers to terminate an employee for any reason, or no reason, as long as it is not for an illegal reason. Option 4) Both B and C is the correct answer.
Step-by-step explanation:
Under the doctrine of employment-at-will, both the employer and the employee have the right to end the employment relationship at any time. The employee has the right to quit the job at any point in time. Moreover, the employer has the right to terminate an employee for any reason - as long as it is not illegal - or for no reason at all. Thus, the correct answer to the question is option 4) Both B and C. However, it's important to note that this does not give employers the right to discriminate based on protected characteristics as per anti-discrimination laws. Additionally, specific terms within an employment contract, union agreements, or during a probationary period can modify these rights and should be reviewed carefully.