A global custodian is primarily responsible for the safekeeping of assets, trade settlement, and maintaining accurate records of positions and market data (Choice C). They also typically provide consolidated reporting on a fund's total exposure (Choice B) and may provide basic historical risk indicators based on the assets they hold (Choice D).

However, providing a comprehensive centralized risk management system (Choice A) is typically beyond their standard scope. Centralized risk management systems—which integrate complex analytics, scenario generation, and stress testing across multiple portfolios and counterparties—are usually provided by specialized risk aggregators or managed internally by the fund's risk management function.