A: The CC-BY license is the most permissive license that also retains some rights for the creators—the only requirement is that someone who uses, modifies, or distributes the content attributes the original creator. Other attributes of Creative Commons licenses include No Derivatives (ND), Non Commercial (NC), and Share Alike (SA), which add additional restrictions that may limit the potential use and impact of your work. Preventing derivatives with ND strongly limits the impact and use of your work, since no one else will be able to build on what you have done. Similarly, while many researchers may prefer the NC limitation to prevent companies from commercializing or making money on their work, strictly defining commercial use is challenging. Furthermore, the intent of much publicly funded research is to lead to economic development through (ventual) commercial use, which would be prevented by this license. Using an SA license allows reuse and distribution, but requires downstream works to apply the same license, limiting use and combination with other works.