A data center needs to ensure that data is not lost at the system level in the event of a blackout. Servers must stay operable for at least an eight-hour window as part of the response and recovery controls implemented. Which redundancy effort should be put in place to ensure the data remains available?

UPS

Explanation:

The redundancy effort that should be put in place to ensure the data remains available is the Uninterruptible Power Supply(UPS).

Uninterruptible Power Supply (UPS) is necessary in the provision of battery backup power when there's drop or stoppage in the flow of electricity. With regards to the question, it'll ensure that data is not lost at the system level in the event of a blackout.

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answer(d) sequencing and iteration;