In advanced English morphosyntax and temporal-aspectual semantics, the interaction between tense, aspectual constraints, and adverbial modification often creates complex distributional patterns. Consider the following four advanced propositions regarding tenses and their correct usage: I. The present perfect tense cannot co-occur with specific, completed past time adverbials that denote a precise, closed point in historical time (e.g., *'I have visited Rome in 2015'* or *'She has graduated yesterday'*), because the present perfect requires an open time frame that connects past action with present psychological relevance. II. The simple past tense is required when narration explicitly moves through a sequential chain of completed historical events, whereas the past continuous tense is deployed to establish background descriptive settings or interrupted actions. III. In future-time conditional clauses introduced by subordinating conjunctions such as *'if'*, *'when'*, *'unless'*, or *'before'* (e.g., *'If it will rain tomorrow, the match will be postponed'*), the future modal auxiliary *'will'* is grammatically mandatory within the subordinate clause to maintain logical temporal concordance with the main clause. IV. The past perfect tense (*'had'* + past participle) is utilized to express an action completed prior to another point or action in the past, establishing clear temporal precedence within narrative discourse (e.g., *'By the time the police arrived, the suspect had fled'*). Identify the option that correctly evaluates the grammatical, syntactic, and semantic validity of propositions I, II, III, and IV according to standard English grammar and Grammatical tense theory.