ads can be created and managed through AdWords.
The correct answer is:
Explanation: You can create TrueView ads in AdWords using the “Video” campaign type. With TrueView ads, you pay when a viewer watches 30 seconds of your video (or the duration if it’s shorter than 30 seconds) or interacts with your video, whichever comes first. This means that you will only pay when someone chooses to interact with your ad.
Read more here: https://support.google.com/adwords/answer/2383007?hl=en