Luca is preparing to run a Google App campaign focused on installs. His client wants to know where the campaign will be eligible to run. How should Luca respond?

Google Search, Google Play, Discover, Gmail, and Google Maps
Gmail, Google Search, Google Play, and 3M videos in the YouTube network
3M sites and apps in the Google and YouTube networks
Google Search, Google Play, YouTube, Discover, and 3M sites and apps in the Google network