Reference:
The deployment server is a Splunk component that distributes apps and other configurations to deployment clients, which are Splunk instances that receive updates from the deployment server. The deployment server can push apps to single, non-clustered Splunk instances, as well as universal forwarders, which are lightweight Splunk agents that forward data to indexers. Therefore, option A is the correct answer. Reference: Splunk Enterprise Certified Admin | Splunk, [About deployment server and forwarder management - Splunk Documentation]