Concept:A master file stores permanent or long-term records used for an organisation's day-to-day operations.Explanation:A master file contains the important records of the organisation, such as names, addresses, and summary details like amounts due or year-to-date sales.It does not hold only assets, a loose collection of data items, or just employee records.Those other options describe special files rather than the overall master file.Answer:A. All records relevant to the organisation.