The correct integration for searching and displaying Splunk results within Cortex XSOAR is the Splunk integration. The Splunk integration in Cortex XSOAR is designed to interact with Splunk, allowing users to search for data and fetch results directly from Splunk into Cortex XSOAR. While other integrations might exist, they serve different purposes or functionalities that are not specifically about searching and displaying Splunk results within Cortex XSOAR.