In a legal dispute concerning whether or not an employer had just cause to dismiss an employee:

Question $6$ options:

the onus is on the employer to show, on a balance of probabilities, that it had just cause

the onus is on the employee to show, on a balance of probabilities, that the employer did not have just cause

the onus is on the employer to show, beyond a reasonable doubt, that it had just cause

the onus is on the employee to show, beyond a reasonable doubt, that the employer did not have just cause