The correct answer is C. Master file.
A master file is a file that contains relatively permanent data. It is used to store information about the organization’s customers, products, and other important data. Master files are typically updated on a regular basis, but they are not changed as frequently as transaction files.
A random file is a file that is organized so that records can be accessed in any order. Random files are often used for files that are accessed frequently, such as a file of customer orders.
A transaction file is a file that contains data about recent transactions. Transaction files are typically updated daily or weekly, and they are used to update master files.
A sequential file is a file that is organized so that records must be
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