Which issue is prohibited by DoubleClick Studio, and will cause an HTML5 creative to fail QA?

DoubleClick Studio prohibits indefinitely looping animations in HTML5 creatives because they can negatively impact user experience and device performance. Such animations can be distracting, consume excessive CPU, and drain battery life, leading to a poor ad experience. Studio's QA process will flag and fail creatives with this issue to ensure compliance with ad quality standards. The other options are not direct prohibitions that would cause a QA failure: Creatives do not need to be built in Google Web Designer; other tools are acceptable as long as the creative meets specifications. A total zipped file size of 250 KB is generally within acceptable limits for most ad platforms, though specific limits can vary. An incorrect exit URL is a functional error that would typically be caught during testing or by the advertiser, but it's not a technical prohibition by Studio that would cause a QA failure based on the creative's build.