Which of the following best describes what transaction-processing system provides?

A.
Redundancy

B.
Consistency

C.
Confidentiality

D.
Availability

Explanation:
Transaction processing is designed to maintain a database in a known,consistent state, by ensuring that any operations carried out on the system that are interdependent are either all completed successfully or all canceled successfully.Transaction processing allows multiple individual operations to be linked together automatically as a single, indivisible transaction. The transaction-processing system ensures that either all operations in a transaction are completed without error, or none of them are.