The general ledger setup function in an enterprise resource package allows for setting accounting periods.

 Explanation:

Granting broad access to critical functions like accounting period setups is often a result of inadequate segregation of duties.

Proper policies would limit access to essential personnel, reducing the risk of errors or fraud.

 Why Other Options Are Incorrect:

A. Changing periods regularly: Does not justify access beyond finance personnel.

B. Posting entries for a closed period: Limited personnel should handle this, not multiple departments.

C. Chart of accounts modifications: A specialized task, not broadly needed across departments.

 EC-Council CISO Reference:Reinforces the need for strict access controls and clear segregation of duties as a security best practice.