Which of the following statements about the storage, retention, and destruction of batch output is most likely to be false?

a. Legislation could specify both a maximum period of retention and a minimum period of retention for batch output

b. Output retained on magnetic media should be rewritten periodically in case storage formats become superseded by new, incompatible formats

c. Inventory controls exercised by a third party should be checked periodically if batch output is stored with the third party

d. The operating system should set the delete flag on confidential files as soon as their retention date expires so the storage space occupied by the file is released to other programs