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

Marketplace has premium inventory for both mobile web and mobile in-app inventory.
App-ads.txt protects publishers and advertisers from fabricated mobile in-app and mobile web inventory.
Creative dimensions work for mobile web and mobile in-app inventory together.
App collections are available for both mobile web and mobile in-app inventory.

The correct answer is:

Marketplace has premium inventory for both mobile web and mobile in-app inventory.