What are targets for IPMP probe-based failure detection configured by?

What are targets for IPMP probe-based failure detection configured by?

A.
responses to SNMP requests

B.
specifying host routes in the routing table

C.
specifying hosts in /etc/default/mpathd

D.
setting the property svc:/network/ipmp/config/transitive-probing

Explanation:
How to Manually Specify Target Systems for Probe-Based Failure Detection
1. Add a route to a particular host to be used as a target in probe-based failure detection.
$ route -p add -host destination-IP gateway-IP -static

where destination-IP and gateway-IP are IPv4 addresses of the host to be used as a target. For
example, you would type the following to specify the target system 192.168.10.137, which is on
the same subnet as the interfaces in IPMP group itops0:
$ route -p add -host 192.168.10.137 192.168.10.137 -static
This new route will be automatically configured every time the system is restarted. If you want to
define only a temporary route to a target system for probe-based failure detection, then do not use
the -p option.
2.Add routes to additional hosts on the network to be used as target systems.