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Answer:
c. Record counts
d. Hash totals
Explanation:
The payroll department could use record counts or hash totals in determining if there was a discrepancy in the total time sheets.
The record count counts the number of records in which case we could we could count the number of rows or columns to determine the record count.
The hash total calculates the sum of all fields in the data, such that we can compare it with the original to determine if there were any changes.