Develop decarbonization strategy scenarios for [Company] given [RegulatoryScenario] across [Region], reflecting IMO rules, ETS/ETS-like schemes, and customer requirements. Using [FleetComposition] and [AbatementOptions] (e.g., LNG, biofuels, shore power, electrified drayage), produce: (A) Executive Summary; (B) Policy Timeline (markdown table: Rule, Effective Date, Applicability, Cost/ton); (C) Carbon Cost Scenarios tied to [CarbonPriceRange] with impact on lane-level contribution margins; (D) Retrofit/Replacement Roadmap and capex plan; (E) Commercial Strategy (green premiums by [CustomerSegments], contract structures, MRV/claims); (F) Residual risk and offsets posture. Include marginal abatement cost curve commentary and operational levers (slow steaming, load factor). Define measurement/verification data sources and governance.