Which statement is true about Bumper ads?

• They’re purchased on a cost-per-view basis.
• They’re available on YouTube and Google Search.
• They’re designed for a mobile-first world.
• They have the lowest CPM among outstream formats.

or

• They’re a 15-second, skippable, in-stream ad format.
• They’re bought on a cost-per-view basis.
• They run outside of a video stream.
• They can be purchased through Google Ads or Google Preferred.

or

• They’re in-stream ads that appear following a video.
• They’re in-stream ads, skippable after five seconds.
• They’re located at the top of the YouTube video home feed.
• They provide reach, frequency, and brand awareness.