Refer to the Exhibit.
In the exhibit, R1 is a route reflector and R2 through R5 are clients in a full mesh configuration. R2
should only receive one copy of all routes sent from R5.Which configuration is valid? 
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Explanation:
I don`t see neighbor to R5 in configuration for answer C …
In config error witn old bump http://www.aiotestking.com/juniper/which-configuration-is-valid-2/
The clue in this question is no-client-reflect command.
This command disable intracluster route redistribution by the system acting as the route reflector. Include this statement when the client cluster is fully meshed to prevent the sending of redundant route advertisements.
http://www.juniper.net/techpubs/en_US/junos13.2/topics/reference/configuration-statement/no-client-reflect-edit-protocols-bgp.html