Which of the following describes the assurance that the widest range of subjects can interact with a resource?

The concept of assurance that the widest range of subjects can interact with a resource is best captured by the notion of accessibility. Accessibility refers to the design and implementation of systems that enable users, regardless of their abilities or the devices they utilize, to access and effectively use resources. This ensures that everyone, including individuals with disabilities or those using various technologies, can interact with the information or systems needed.

In an information security context, ensuring accessibility contributes to inclusivity and allows for a broad user base. It emphasizes that security solutions should not only protect sensitive information but also ensure that legitimate users can access the resources needed for their roles. This is particularly important in environments where diverse users rely on secure systems.

The other options do not encapsulate this idea effectively. Timeliness pertains to information being available when needed, responsibility relates to the accountability of subjects handling resources, and usability focuses on how easy or effective it is for users to operate a system. While these factors are important, they do not encompass the breadth of interaction with a resource that accessibility does.