In the historical evolution and pedagogical design of second language teaching methodologies, the Communicative Approach (CLT) and Task-Based Language Teaching (TBLT) introduced radical shifts away from traditional structural drills. Consider the following four advanced propositions regarding communicative and task-based principles: I. In CLT, the pedagogical syllabus transitions from a purely structural focus (grammar and vocabulary lists) to a functional-notional syllabus that organizes instruction around communicative intents (e.g., apologizing, inviting, persuading) and conceptual categories (e.g., time, space, quantity). II. According to David Nunan and Michael Long's frameworks, a pedagogical 'task' must require learners to prioritize linguistic form and mechanical accuracy above all else, ensuring that communicative goals are treated as entirely secondary until absolute error-free syntactic production is mastered. III. In TBLT, communicative tasks are generally categorized into 'target tasks' (real-world tasks that learners need to perform outside the classroom) and 'pedagogical tasks' (classroom-based communicative activities designed to bridge the gap toward target task performance). IV. The concept of 'communicative competence', originally coined by Dell Hymes in reaction to Noam Chomsky's linguistic competence, encompasses not only grammatical accuracy but also sociolinguistic, discourse, and strategic competencies necessary for effective real-world interaction. Identify the option that correctly evaluates the pedagogical, linguistic, and theoretical validity of propositions I, II, III, and IV according to modern language teaching methodology and Communicative language teaching principles.