How can multiple Campaign records be associated with a single Opportunity?

The correct choice is Campaign Influence, as it allows multiple Campaign records to be linked to a single Opportunity, reflecting the impact of various marketing efforts on the sales process. This feature is particularly valuable in scenarios where an Opportunity may be influenced by several campaigns, providing a more comprehensive view of how different marketing initiatives contribute to closing a deal.

With Campaign Influence, businesses can analyze the effectiveness of multiple campaigns and understand how each one plays a role in driving revenue. This capability ensures that marketing efforts can be appropriately credited for their contribution toward the sales process, making it easier for organizations to measure the return on investment for their marketing activities.

In contrast, Campaign Members typically pertain to individual contacts associated with campaigns rather than the cumulative influence of multiple campaigns on a single Opportunity. The Primary Campaign Source identifies the main campaign tied to an Opportunity but does not accommodate the association of multiple campaigns. Lastly, Campaign Hierarchy provides a framework for organizing campaigns but does not facilitate the direct association of multiple records with a single Opportunity.