Which of the following statements is true? a) When an employee who is paid on a weekly basis takes two weeks vacation, the payroll frequency should be changed to "26". b) If the session date has been advanced in error to the last day of the month this will stop the first three weeks of the month payroll transactions from being recorded. c) Both the Payroll Journal and the Payroll Cheque Run will permit negative cheques (necessary for corrections). d) The term Net pay refers to the amount of the total pay the employee earned during the period (week, bi-weekly, month)