Which statement best describes ACID properties in databases?

Which statement best describes ACID properties in databases?

• A. Atomicity, Consistency, Isolation, Durability; Atomicity: all or nothing; Consistency: validity constraints; Isolation: concurrent transactions don't interfere; Durability: changes persist after commit.
• B. Atomicity: all data stored in a single file; Consistency: only for single-user systems; Isolation: no transactions; Durability: data is never lost.
• C. Atomicity: data replication; Consistency: data type enforcement; Isolation: single-thread execution; Durability: weekly backups.
• D. Atomicity: partial commits allowed; Consistency: inconsistent states allowed; Isolation: parallel writes allowed; Durability: data is ephemeral.

Answer: (A)