Which of the following independent errors would not be detected by batch con- trols? 

a. The computer operator added a fictitious employee to the processing of the weekly time cards. 

b. An employee who worked only 5 hours in the week was paid for 50 hours. 

c. The time card for one employee was not processed because it was lost in tran- sit between the payroll department and the data entry function. d. All of the above would be detected.