Why would the health status of an environment be missing in vRealize Suite Lifecycle Manager (vRSLCM)?

Why would the health status of an environment be missing in vRealize Suite Lifecycle Manager (vRSLCM)?
A. Identity Manager is not deployed in the environment.
B. vRealize Log Insight is not deployed in the environment.
C. The SDDC Management Health solution pack is not configured in vRealize Operations Manager.
D. The vRSLCM Management solution pack is not configured in vRealize Operations Manager.