What is this configuration an example of?

Refer to the exhibit. What is this configuration an example of?

A.
GLBP weighting

B.
Default AVF and AVG configuration

C.
GLBP MD5 authentication

D.
GLBP text authentication

E.
GLBP timer manipulation

Explanation:

Configuring GLBP Weighting: Example
In the following example, Router A, shown in Figure 1, is configured to track the IP routing state of the POS interface 5/0 and 6/0, an initial GLBP weighting with upper and lower thresholds is set, and a weighting decrement value of 10 is set. If POS interface 5/0 and 6/0 goes down, the weighting value of the router is reduced.
track 1 interface POS 5/0 ip routing
track 2 interface POS 6/0 ip routing
interface fastethernet 0/0
glbp 10 weighting 110 lower 95 upper 105
glbp 10 weighting track 1 decrement 10
glbp 10 weighting track 2 decrement 10
glbp 10 forwarder preempt delay minimum 60
Reference:
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1040123