Q: Fill in the blank. The best practice for a/b testing two different calls to action for a __________ad is to test banners that are __________in every way, with the exception of the call to action. A) banner, differentB) text, identicalC) banner, identicalD) text, different Correct Answer is C) banner, identical. Explanation: The best practice for A/B testing two different calls to action for a display ad is to test banners that are identical in every way, with the exception of the call to action. This means that the design, color scheme, images, and other elements should be kept the…