Define the term "system scalability" in the context of verification.

System scalability refers to the ability of a system to grow and adapt to handle an increase in demands without compromising performance. This is crucial in verification processes, as it ensures that when additional resources, users, or data loads are introduced, the system can manage them efficiently and maintain its operational capabilities.

Scalability assesses not only the system's capacity to expand in terms of hardware resources, like servers or storage, but also how well it can manage increased workloads, such as more network traffic or additional user requests. In verification, it's essential to evaluate whether a system can continue to operate effectively under these enhanced conditions, which aligns with the definition provided.

While other options touch on different aspects of system functionality, they do not encapsulate the broader concept of scalability. Upgrading hardware is a part of scalability but does not define it entirely. The effectiveness under low load and the ability to connect multiple devices focus on specific functionalities rather than the overall capability for growth and demand management. Understanding scalability is vital for ensuring long-term performance and reliability in system design and verification.