The fifth objective in an IS audit is ensuring accurate source data. Select all of the following controls that would be effective in minimizing the threats to source data in an information system.

a. Effective handling of source data input by data control personnel

b. Logging the receipt, movement, and disposition of source data input

c. Management and user approval of programming specifications

d. Effective procedures for correcting and resubmitting erroneous data

e. Disaster recovery plan