Casey was looking through some old files that he named before he understood file naming conventions. Which file name is contrary to best practices?

The file name that is contrary to best practices is **Acme_Roofing _Promo.pdf**. This file name includes an unnecessary space before the underscore, which can cause issues with certain systems and may lead to confusion. Best practices typically include using hyphens or underscores consistently without extra spaces, as well as avoiding spaces altogether for better compatibility.