You are tasked with ensuring that a mobile app's user data remains consistent across multiple devices. Which database feature or principle would be critical to implement?
- ACID Transactions
- CAP Theorem
- MapReduce
- Sharding
To maintain data consistency across multiple devices, you should implement 'ACID transactions' (Atomicity, Consistency, Isolation, Durability). ACID transactions ensure that data changes are either fully completed or fully undone, preventing inconsistencies.
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