Below is the answer and explanation for the question an advertiser can: 

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

correct answer

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

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