Explanation:

- Option 1: To discover errors and frauds

This involves identifying discrepancies or intentional misrepresentations in financial records or transactions.

- Option 2: To prevent errors and frauds

Prevention focuses on implementing controls and procedures to stop errors or frauds before they occur.

- Option 3: To verify statements

This means confirming the accuracy and completeness of financial statements or records.

- Option 4: All the above

Auditing or investigating can include discovering, preventing errors and frauds, and verifying statements, so all the above options are interconnected.