In the psycholinguistic and functional study of oral communication, spoken language operates across multiple socio-pragmatic dimensions. When examining the functional framework established by linguists like Michael Halliday and George Yule, spoken discourse in listening and speaking is broadly categorized into transactional and interactional functions. Consider the following complex propositions regarding these functions of language:I. The transactional function of spoken language is primarily message-oriented, where the central objective is the efficient and accurate transfer of information, goods, or services, ensuring the receiver correctly comprehends the explicit content.II. The interactional function of spoken language is primarily listener-oriented or interpersonal, where the core purpose is social bonding, maintaining social relationships, and managing face-to-face rapport (often manifested as phatic communion), where message accuracy is secondary to social solidarity.III. In communicative language teaching (CLT), designing listening and speaking tasks requires a strict dichotomy: classroom activities must exclusively focus on either pure transactional exchange or pure interactional dialogue, as hybrid tasks undermine pragmatic competence.IV. Spoken discourse analysis demonstrates that many everyday oral interactions (such as casual chit-chat during a business negotiation or greeting a colleague before asking for a report) seamlessly blend both transactional and interactional functions within the same communicative event.Identify the option that correctly evaluates the pedagogical and linguistic validity of propositions I, II, III, and IV.