Question: When a record in an indexed file is not needed for further processing, _____. a. Its first character must be replaced with a special character,

When a record in an indexed file is not needed for further processing, _____.

a. Its first character must be replaced with a special character, indicating it is a deleted record

b. Its position must be retained, but its fields must be replaced with blanks

c. It must be physically removed from the file

d. The record can stay in place physically, but its reference is removed from the index

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