Final answer:
The Devices report under "Mobile" shows whether a website was viewed on mobile devices.
Step-by-step explanation:
The correct answer is d. The Devices report under "Mobile". The Devices report, found under the "Mobile" section, shows information about the devices used to access a website, including whether it was viewed on mobile devices. This report provides data on various mobile devices used, such as smartphones and tablets, and allows website owners to analyze the mobile traffic to their site.