A live shadow copy configuration (functionally similar to lockstep fault-tolerant VM technologies) maintains two synchronized instances of a virtual machine, a primary and a secondary, so that if the primary fails, the secondary can take over instantly with no perceptible interruption. However, after that failover, the environment is temporarily running with only a single, unprotected instance; if that surviving VM were then to fail, there would be no redundancy left to fall back on. To restore the original level of protection, the platform automatically instantiates a new secondary VM and re-establishes synchronization with the now-promoted primary, returning the pair to a fully redundant state. Option A is incorrect because the failed VM itself is not repaired; live shadow copy protects availability through redundancy, not through self-healing of the failed instance. Option B describes a degraded, unprotected state that defeats the purpose of the technology and is not how these platforms are designed to behave. Option D conflates the already-completed failover (the secondary becomes primary at that moment) with the separate, necessary step of rebuilding redundancy afterward. Re-establishing a new secondary is the correct behavior.

Reference topic: Fault Tolerance Techniques - Continuous VM Availability and Live Shadow Copy.