An advertiser creates a display ad with Ad gallery. It doesn't show properly in all the sizes the advertiser wants to use. What should the advertiser do to ensure that it shows in all sizes without limiting exposure?

AdWords Display Advertising Exam and Answer (Updated April 2016)

An advertiser creates a display ad with Ad gallery. It doesn't show properly in all the sizes the advertiser wants to use. What should the advertiser do to ensure that it shows in all sizes without limiting exposure?

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