What does isolation.level=read_committed do in a Kafka consumer, and when would you enable it?

What does isolation.level=read_committed do in a Kafka consumer, and when would you enable it?

• A. It ensures the consumer only sees committed (EOS) messages; enable when using transactions and EOS.
• B. It makes the consumer see all messages including uncommitted.
• C. It affects producers only.
• D. It disables transactions.

Answer: (A)