Final answer:
CMDB, or Configuration Management Database, is a centralized repository that holds information on all components of an organization's IT infrastructure and their interrelationships, crucial for effective IT service management.
Step-by-step explanation:
The term CMDB stands for Configuration Management Database. Among the options provided, the one that best describes a CMDB is C. A centralized place for all IT service infrastructure components and their relationships.
A CMDB is an integral part of the IT Infrastructure Library (ITIL) framework and is vital for managing all the components within the IT infrastructure of an organization. It holds data related to all of the configuration items (CIs) and details their interrelationships, which are crucial for delivering IT services effectively.