Which of the following describes the ACID properties?

The ACID properties of database transactions are fundamental principles that guarantee reliable processing of database transactions. Atomicity, Consistency, Isolation, and Durability are essential for ensuring the integrity of the database system.

Atomicity ensures that each transaction is treated as a single, indivisible unit. This means that either the entire transaction is completed successfully, or none of it is applied to the database. This prevents partial updates that could lead to data inconsistency.

Consistency guarantees that a transaction will bring the database from one valid state to another, maintaining all predefined rules, including constraints, cascades, and triggers. This ensures that data remains in a valid state before and after the transaction.

Isolation ensures that multiple transactions occurring at the same time do not affect each other's execution. This is crucial for preventing data corruption in a concurrent environment, where transactions are executed simultaneously.

Durability assures that once a transaction has been committed, it will remain so, even in the event of a system failure. This means that the data is permanently saved and can be recovered, ensuring data integrity over time.

The other options do not accurately represent these principles. Therefore, the correct description of the ACID properties is Atomicity, Consistency, Isolation, and Durability.