what is the Audit Control Objective related to audit tools? a. the independent performance of services that rely on audit tools was not adversely affected, either directly or indirectly, by entity personnel b. end user technology support protocols and resources are established to ensure the appropriate investigation and response to issues arising during audit tool usage c. the confidentiality of entity information is preserved consistent with Deloitte confidentiality policies d. the logic and calculations embodied in the audit tool and in any supplemental programs result in the audit tool functioning as intended