In advanced English syntax and voice conversion, transforming sentences containing complex structures—such as ditransitive verbs, passive infinitives, complement clauses, and causative verbs—demands rigorous structural precision. Consider the following four advanced propositions regarding active and passive voice transformations: I. When converting a ditransitive active sentence with two objects (e.g., "The board awarded the senior researcher a prestigious fellowship") into the passive voice, either object can theoretically be promoted to the subject position; however, promoting the direct object ("A prestigious fellowship was awarded to the senior researcher by the board") is stylistically preferred when the indirect object is heavily modified or when focal emphasis on the entity transferred is desired. II. Active sentences featuring causative verbs such as "make", "bid", or "let" followed by a bare infinitive (e.g., "The director made the actors rehearse the entire scene twice") drop the bare infinitive status in their passive transformations, requiring the insertion of the full infinitive particle 'to' (e.g., "The actors were made to rehearse the entire scene twice by the director"). III. In complex active constructions involving verbs of reporting or opinion followed by a finite that-clause complement (e.g., "Economists believe that inflation will moderate in the final quarter"), the passive transformation can be formulated using an impersonal dummy subject "It" (e.g., "It is believed that inflation will moderate in the final quarter") or via subject-to-subject raising where the embedded subject is promoted (e.g., "Inflation is believed to moderate in the final quarter"). IV. Sentences containing modal auxiliary verbs in past counterfactual structures followed by a perfect infinitive (e.g., "The committee should have submitted the compliance report yesterday") can be freely converted into the passive voice by retaining the identical modal and aspectual auxiliary sequence without any structural alteration (e.g., "The compliance report should have been submitted yesterday by the committee"). Identify the option that correctly evaluates the grammatical, syntactic, and transformational validity of propositions I, II, III, and IV according to standard English grammar and English passive voice principles.