What is the primary way that the preservation of records supports accountability?

10. The preservation of records supports accountability mainly by:

• B. documenting organizational activities and decisions

Preserving records ensures that there is a reliable and accessible history of an organization's actions, policies, and decisions. This documentation is essential for accountability because it provides evidence that can be reviewed, audited, and used to verify compliance, justify actions, and hold individuals or the organization responsible.

The final answer is $\text{B}$.