Which of the following is WRONG regarding the right to refrainfrom working?

a) The employer cannot terminate the contract of the employee,who refers to the right to refrain from working.
b) The employee, who wants to terminate the contract, must alsocomply with same rules and wait for 20 days after due date.
c) If the employer cannot afford to make a payment due to a forcemajeure -earthquake, flood, etc.- the employee cannot refer to thisright.
d) This right cannot be applied before 20 days passed after the duedate for the payment of the wages.