Which statement is true about non-skippable in-stream ads? (Duplicate 1) - The Future Of Ink

Home Google Ads Video Certification Exam Which statement is true about non-skippable in-stream ads? (Duplicate 1)

Non-skippable in-stream ads are available on YouTube and advertiser websites.
Non-skippable in-stream ads are available in auction or as a reservation buy.
Non-skippable in-stream ads can be bought on target CPM or CPD.
Non-skippable in-stream ads are six-second ads that show before a video.