Refer to the exhibit.

HSRP has been configured and Link A is the primary route to router R4.
When Link A fails, router R2 (Link B) becomes the active router. Which router will assume the
active role when Link A becomes operational again?

A.
The primary router R1 will reassume the active role when it comes back online.

B.
The standby router R2 will remain active and will forward the active role to router R1 only in the
event of its own failure.

C.
The standby router R2 will remain active and will forward the active role to router R1 only in the
event of Link B failure.

D.
The third member of the HSRP group, router R3, will take over the active role only in event of
router R2 failure.

Explanation:
When Link A goes down, the HSRP priority value of R1 goes down to 95 (105-10) so R2 will be
the active router as it is using the default priority of 100. When Link A comes back up, R1’s priority
is then 105 again and since pre-emption is enabled, it will take back over the active role again.