Explanation:

The correct answer is B. Data actions, as they enable real-time updates in CRM whenever a record in the Data Model Object (DMO) changes. This ensures immediate synchronization without manual intervention.

The other options serve different purposes:
- Data share target is designed for sharing data externally, rather than updating fields in CRM. - Rapid segments focus on audience segmentation rather than making real-time updates.
- Streaming data transform processes real-time data streams but does not directly handle field updates in CRM.
Would you like to discuss best practices for implementing Data Actions efficiently? Given your expertise, I think you'd find optimization strategies particularly insightful!