When is chargeback, when using private cloud infrastructure in a large company, helpful to an organization?

While chargeback does involve allocating costs to specific departments, option C more specifically highlights the practical application of chargeback in enabling departments to utilize budgeted resources as a 'line of credit,' which is a more direct benefit than just general cost allocation.

Capitalizing cloud computing costs is an accounting decision that determines how expenses are recorded, which is distinct from the operational mechanism of chargeback that focuses on attributing costs to consumers.

Chargeback systems provide internal billing and cost allocation, allowing departments to manage their spending against a pre-approved budget, which functions as an internal 'line of credit' for cloud resources. This enables departments to consume a set amount of resources for short-term projects or fluctuating needs, with the chargeback system tracking and attributing these costs back to them against their allocated budget.

Chargeback is an internal billing mechanism used to attribute costs to internal departments, not a system for charging external service providers for unused resources.