When integrating with Splunk, what will allow you to push alerts into Cortex XSOAR via the REST API?

The option indicating the Cortex XSOAR TA APP for Splunk is the correct choice for enabling the integration with Splunk to push alerts into Cortex XSOAR via the REST API. This app acts as a bridge between Splunk and Cortex XSOAR, allowing for seamless data transfer and automation of alert processing in an incident response workflow.

When this app is deployed, it provides the necessary configurations and functionalities required to connect to the Cortex XSOAR platform. It allows users to create alerts in Splunk that can then be sent directly to Cortex XSOAR, leveraging the REST API. This integration supports efficient incident management by automating the ingestion of alerts from Splunk into the security orchestration and automation capabilities of Cortex XSOAR.

The other options, while they may relate to the functionality of Splunk and Cortex XSOAR, do not specifically facilitate the direct pushing of alerts via the REST API in the same manner as the Cortex XSOAR TA APP for Splunk. Each serves different purposes within the Splunk-Cortex ecosystem, but the app is specifically designed for the integration task at hand.