Anna is deciding what video ad solution to use. Anna wants an in-stream and out-stream video ad that has a creative builder and she can test different creative variables. Which video ad solution should Anna select?

Online Video ads are the correct choice because they offer both in-stream and out-stream placements, a creative builder tool, and the ability to test different creative variables. This solution provides the flexibility Anna needs for her campaign. Streaming TV ads are primarily in-stream and do not offer the same creative builder or testing capabilities for out-stream placements. Sponsored Display video is focused on product-centric video ads within Amazon's retail environment and does not encompass the broad in-stream/out-stream reach or creative testing features Anna is looking for.