Explanation: Preventive controls are the security controls that are intended to prevent an incident from occurring, e.g., by locking out unauthorized intruders. Answer: C is incorrect. Detective controls are intended to identify and characterize an incident in progress, e.g., by sounding the intruder alarm and alerting the security guards or police. Answer: A is incorrect. Corrective controls are intended to limit the extent of any damage caused by the incident, e.g., by recovering the organization to normal working status as efficiently as possible. Answer: B is incorrect. There is no such categorization of controls based on time.