In a sequential master file update procedure, when the transaction key is equal to the master key, which of the following is true?
a) The master record is either deleted or updated with the data from the transaction record.
b) The transaction record is added to the master file.
c) There are no more transaction records that affect the current master record.
d) The next master record is read.
a) The master record is either deleted or updated with the data from the transaction record.
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