What conf file needs to be edited to set up distributed search groups?

What conf file needs to be edited to set up distributed search groups?
A . props.conf
B . search.conf
C . distsearch.conf
D . distibutedsearch.conf

Answer: C

Explanation:

"You can group your search peers to facilitate searching on a subset of them. Groups of search peers are known as "distributed search groups." You specify distributed search groups in the distsearch.conf file"

Reference: https://docs.splunk.com/Documentation/Splunk/8.0.5/DistSearch/Distributedsearchgroups