Within Display & Video 360, what statement about mobile in-app and mobile web inventory is correct?

In the context of Display & Video 360, the statement that Marketplace has premium inventory for both mobile web and mobile in-app inventory is correct because the Marketplace serves as the central hub for discovering and negotiating high-quality deals across all mobile environments. While other options contain technical inaccuracies—such as app-ads.txt being specific to apps rather than web, or creative dimensions often requiring specific mobile-only sizes—the Marketplace is designed to provide transparent access to premium publishers regardless of whether their content is consumed via a mobile browser or a dedicated application. This allows advertisers to secure high-impact placements, such as Interstitials or Rewarded Video, through Private Auction or Programmatic Guaranteed deals that span the entire mobile ecosystem.