What is the range of heights for handrails on exit stairs?

The range of heights for handrails on exit stairs is defined to ensure safety and accessibility for users. The correct choice indicates that handrails should be positioned between 760 mm and 865 mm. This height range has been established to accommodate a wide range of users, including children, adults, and individuals with disabilities, allowing for a secure and comfortable grip when using stairs.

In addition, this height range is consistent with many building codes and safety standards, which aim to provide stability and support while descending or ascending stairs. Having handrails within this specified range minimizes the risk of accidents and enhances the overall safety of the stairway.

Other potential height ranges might not meet the regulatory standards or the ergonomic needs of users, which could lead to safety issues. Therefore, choice C effectively captures the required height range that is not only compliant with regulations but also facilitates the safe navigation of stairways for all users.