Which statement best captures the role of Finance Commissions in Indian fiscal federalism?

Finance Commission role in fiscal federalism: (a) Constitutional mandate: Article 280 requires President to constitute FC every 5 years to recommend distribution of tax revenues between Union and States, grants-in-aid principles, (b) Mediation function: (i) Technical assessment: FC uses objective criteria (population, income distance, area, forest cover, demographic performance) to mediate fiscal claims, depoliticizing resource distribution, (ii) Independent arbitration: FC as independent body balances Union fiscal space with State autonomy, needier States with reforming States, (iii) Cooperative federalism: FC recommendations enable cooperative fiscal governance through dialogue, consensus, not coercion, (c) Applications: (i) Vertical devolution: FC recommends share of Union taxes to States (41% by 15th FC), enabling State expenditure autonomy, (ii) Horizontal distribution: FC allocates State shares using criteria balancing equity (needier States) with efficiency (rewarding reforms), (iii) Grants-in-aid: FC recommends grants for local bodies, disaster management, sectoral priorities, complementing devolution, (d) Challenges: (i) Political pressures: FC recommendations may face political resistance if perceived as unfavorable, (ii) Implementation: States, Union must implement FC recommendations in good faith for cooperative federalism to work, (iii) Adaptation: FC must evolve criteria to address contemporary challenges (climate change, digital governance, demographic transition), (e) Illustrates institutionalized fiscal federalism: FC provides regular, technical mediation of Centre-State fiscal claims; independent, criteria-based approach promotes cooperative federalism, depoliticizes resource distribution.