What is a roof ladder designed to do?

A roof ladder is specifically designed to anchor over the roof ridge with folding hooks. This design allows firefighters to secure the ladder effectively, providing stability and safety when working at height on sloped roofs. The folding hooks, which can be extended and then locked in place, grip the peak of the roof, preventing the ladder from slipping or sliding during operations. This feature is crucial for maintaining safety standards during rescue operations or when conducting assessments in high-risk environments.

While other answers may describe functions that ladders can perform, they do not capture the primary purpose and design of a roof ladder. For example, while a roof ladder might provide additional height or lend stability when needed, the distinctive characteristic of how it secures itself to the roof makes option B the most accurate.