Which organization is tasked with providing finance and accounting services for the Department of Defense?

The Defense Finance and Accounting Service (DFAS) is the correct answer because it is specifically established to provide finance and accounting services for the Department of Defense (DoD). DFAS is responsible for ensuring that the financial operations within the DoD are efficient and effective, which includes budget processing, payroll, and accounting for military personnel and various defense-related expenditures. This organization plays a crucial role in ensuring financial integrity and compliance across all DoD entities.

Other options listed, while related to government financial oversight, do not serve the same specific function as DFAS. The Department of Defense Office of the Comptroller oversees the overall financial management of the DoD but does not directly handle the day-to-day finance and accounting services. The Government Accountability Office (GAO) is focused on auditing and evaluating government operations and financials, ensuring accountability, but it does not provide direct financial services. The Department of Treasury manages federal finances, but its scope is much broader and not limited to the specific financial services relevant to the Department of Defense. Hence, DFAS is uniquely positioned as the organization responsible for these services within the DoD.