An advertiser can:

  • A) remarket video ads from the Google Search Network on the Google Display Network
  • B) target viewers who are watching competitors’ ads on YouTube
  • C) optimize remarketing by raising bids on topics or channels that generate the greatest ad response
  • D) combine an AdWords remarketing list with a video remarketing list

The correct answer is:

C) optimize remarketing by raising bids on topics or channels that generate the greatest ad response

Explanation: Optimize your remarketing campaign based on performance metrics. For example, raise bids on specific topics or channels that generate the greatest ad response.

Read more here: https://support.google.com/adwords/answer/2545661?hl=en