What is the purpose of enabling enable.idempotence on a Kafka producer, and what constraint does it impose on acks and in-flight requests?

• A. Idempotence prevents duplicate records on retries; requires acks=all and max.in.flight.requests.per_connection (to 5 or less); works with transaction-enabled producers.
• B. Idempotence cannot work with transactions.
• C. Idempotence causes duplicates.
• D. Idempotence only applies to consumers.

Answer: (A)