Which two components can be installed in monitored virtual machines to trigger vSphere HA Application Monitoring?

Which two components can be installed in monitored virtual machines to trigger vSphere HA
Application Monitoring? (Choose two.)

A.
A custom script utilizing the appmonitor executable

B.
Tne vSphere Fault Tolerant agent

C.
Third-party utilities such as Neverfail or ApplicationHA

D.
The vSphere HA application agent