Where is a Local Route Group configuration applied?

Where is a Local Route Group configuration applied?

A.
in each IP phone

B.
in each device pool

C.
in each location

D.
in each region

E.
in each route list

Explanation:
Link : http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmfeat/fslrg.html
Explanation : The local route group does not statically get bound to any provisioned route group.
Local route group field exists on device pool.
Cisco Unified Communications Manager Features and Services Guide for Cisco

Unified Communications Manager Release 8.5(1) , page-794.