The monthly payroll input file for your client includes the following fields:

1. Employee number

2. Number of overtime hours worked

3. Overtime hourly pay rate

Which of the following data input control would be the MOST appropriate in addressing the risk that payments are made for overtime hours not actually worked?

Select one:

a. Limit check on Field 2.

b. Field check on Field 3.

c. Valid code check on Field 2.

d. Check digit on Field 1.