[Reference:https://docs.splunk.com/Documentation/Splunk/8.2.3/Admin/Groups,stacks,pools,andotherterminology, , When using license pools, volume allocations apply to indexers. A license pool is a group of indexers that share a certain amount of daily indexing volume. The license pool specifies how much data each indexer can index per day, as well as which indexes are available for each indexer. Therefore, option A is the correct answer. References: Splunk Enterprise Certified Admin | Splunk, [Set up and manage license pools - Splunk Documentation], , ]