Answer (C) is correct. All of the terms listed refer to program controls to prescreen or edit data prior to processing, but the sequence check is most likely to be used only in batch processing. A sequence check tests to determine that records are in proper order. For example, a payroll input file would be sorted into Social Security number order. A sequence check could then be performed to verify record order. This control would not apply in a real-time operation because records would not be processed sequentially.