Final answer:
To protect data during a power outage and allow for safe saving and shutdown of computers, you should use a Uninterruptible Power Supply (UPS), which provides temporary power.
Step-by-step explanation:
To ensure that data on your organization's computers is not lost during a power outage and to give users enough time to save their data, you should use a Uninterruptible Power Supply (UPS). A UPS provides backup power in the event of an outage, typically long enough for users to save their work and safely shut down their computers. The other options, such as a door lock, air conditioner, and sprinkler, do not help in maintaining power or saving data.