Which statement best captures the value proposition of Google's experimentation tool?

The Google Ads experimentation tool allows advertisers to test changes to their campaigns, including different creatives, audience targeting, bidding strategies, and other settings. This enables data-driven decisions to optimize campaign performance. The tool provides a controlled environment to compare the performance of a new version against the original, helping to identify what works best. The other options are incorrect because: "small additional cost" is not a guaranteed feature or a primary value proposition; the tool itself doesn't inherently add cost beyond ad spend. "shows all users two versions of an ad" is inaccurate; experiments typically split traffic, showing different versions to different segments of users, not necessarily showing two versions to every single user. "simulated ad environment" is incorrect; the experiments run in a live ad environment, not a simulation, to gather real-world performance data.