The correct answers are: The approval of purchase invoices; The maintenance of a receivables ledger control account; The performance of a bank reconciliation; Limiting physical access to the inventory records.

The approval and control of documents, maintaining control accounts and reconciliations and limiting physical access to assets and records all constitute specific control activities. Computer controls, checking the arithmetical accuracy of documents, and comparing assets with records are also examples of control procedures.

Management's philosophy and operating style is a feature of the control environment. The distinction between the control environment and control activities is important because the former can be evaluated but not tested, whereas the latter can be both evaluated and tested.