Refer to the VoIP network shown in the exhibit. On which link in the network would the QoS mechanism link fragmentation and interleaving (LFI) most likely be deployed?

A.
Between the branch router and the WAN.

B.
Between the branch switch and the branch router.

C.
Between the branch IP phones and the branch switch.

D.
Between the CallManager and the HQ router.

E.
Between the HQ IP phones and the HQ router.

F.
Between the HQ switch and the HQ router.