Which policy type tracks tunnel characteristics for SLA-based convergence and path selection?

App-route policy is the correct answer because it specifically monitors tunnel characteristics such as latency, jitter, and packet loss to make intelligent decisions about path selection and convergence based on Service Level Agreement (SLA) requirements. This ensures that application traffic is routed over the best performing path. VPN membership policy defines which VPNs can communicate, not tunnel characteristics. Control policy influences the control plane (e.g., OMP routes), but not directly tunnel performance for SLA. Data policy affects the data plane (e.g., access lists, QoS), but app-route policy is specifically designed for SLA-based path selection.