How should an admin activate the KPI Signals?

The correct choice states that KPI Signals are active by default, indicating that users do not need to take any additional steps to enable this feature after installation. This is advantageous for administrators as it simplifies the setup process and allows for immediate access to critical performance metrics without needing to go through activation procedures.

The presence of KPI Signals as an active feature by default aligns with the goal of making analytics straightforward and user-friendly for organizations, ensuring that they start tracking key performance indicators right away without unnecessary hurdles.

Although the other options may involve steps related to features or support in ServiceNow, they do not pertain to the activation of KPI Signals since those signals are readily available upon installation.