Which of the following would enable a data center to remain operational through a multiday power outage?

A generator is the correct answer because it provides a long-term power source, capable of running for days or even weeks with sufficient fuel, making it ideal for multiday power outages. An uninterruptible power supply (UPS) provides only short-term backup power (minutes to hours) to allow for graceful shutdown or generator startup, not sustained operation. Replication is a data availability strategy, not a power solution. Parallel processing involves distributing computing tasks across multiple processors and is unrelated to power resilience.