(A) To see which type of ad brought in the most revenue.
(B) To see the actual number of subscribers that watched the ad and commented on the video.
(C) To see the approximate ratio of how many views resulted in an ad being served and how it is trending over time.
(D) To see how the ad rates are affected by viewer engagement.
This question is a part of the YouTube Channel Growth Assessment. You can find answers to all the questions asked in this exam in our YouTube Channel Growth Assessment Answers page.