A business continuity site is designed to ensure that business operations can continue in the event of a major disruption, such as a service outage. This availability concern is mitigated by having backup sites that can take over operations if the primary site is compromised or offline, ensuring that the organization remains functional.
B . Wiretapping and C. Eavesdropping are security concerns related to unauthorized access to communications.
D . Replay attack is a network security threat, not directly related to availability.
Reference:
CompTIA Security+ Certification Guide
Business Continuity and Disaster Recovery Planning