In which situation does bias become a barrier to communication?

Correct answer: When a person refuses to listen even to correct information because of a preconceived opinion.

Bias is a pre-existing judgement that can prevent objective listening. In option A, the person rejects correct information because of an earlier opinion, so the message cannot be considered fairly. Open-minded listening, checking facts, and asking respectful questions reduce bias and support understanding rather than create a barrier.