What is the purpose of including dialogues in the Listening section?

Including dialogues in the Listening section plays a crucial role in assessing comprehension of conversational English. The dialogues reflect real-life interactions that learners are likely to encounter, helping to gauge their ability to understand spoken language in everyday contexts. This component is vital for evaluating how well students can interpret nuances, tone, and the flow of conversation, which can often be quite different from written English.

While entertainment, grammar teaching, and vocabulary testing are valid aspects of language learning, they do not capture the primary focus of this specific section. Dialogues are designed to challenge learners' listening skills and comprehension in a way that mirrors genuine conversational scenarios, making option B the most appropriate choice for the purpose outlined in the question.