Managing client access to the Marketplace through the Ad Exchange API provides what benefit?

The Ad Exchange API allows buyers to programmatically manage various aspects of their client accounts, including tracking the status of negotiations. This provides transparency and efficiency, enabling buyers to monitor progress and take action as needed. The other options are incorrect because: Submitting creatives is typically done through the Ad Exchange UI or specific creative APIs, not directly through client access management. Managing client invoicing is a financial and administrative function usually handled outside the core Ad Exchange API for client access. Checking creatives against pre-targeting is a function related to creative approval and targeting, not a primary benefit of managing client access to the Marketplace.