Explanation
The user can change the wallpaper using a Windows 10 Settings tool by following these steps12:
Open Settings by pressing the Windows key and typing Settings, or by clicking the gear icon in the Start menu.
Select Personalization from the left navigation menu.
On the right side of the window, click Background.
In the Background settings, click the drop-down menu and select Picture as the background type.
Click Browse and then locate and open the image the user wants to use as the wallpaper.
The other options are incorrect because they do not lead to the Background settings or they do not allow the user to browse for an image. Accounts, System, and Apps are not related to personalization settings. Your info, Display, and Apps & features are not related to wallpaper settings.
References: 1:
https://support.microsoft.com/en-us/windows/change-your-desktop-background-image-175618be-4cf1-c159-278
2: https://www.computerhope.com/issues/ch000592.htm

Explanation
RADIUS stands for Remote Authentication Dial-In User Service and it is a protocol that provides centralized authentication, authorization, and accounting for network access. RADIUS can be used to implement a method of wireless security that requires both a user and the user's computer to be in specific managed groups on the server in order to connect to Wi-Fi. This is also known as 802.1X authentication or EAP-TLS authentication

Explanation
The account access level the user will need to access advanced features and configuration settings for several applications while adhering to corporate policy requiring a least privilege environment is a standard account. This is because a standard account allows the user to access advanced features and configuration settings for several applications while adhering to corporate policy requiring a least privilege environment1.

Explanation
Rolling back video card drivers is the best way to resolve the issue of large desktop icons on a user's newly issued PC. This means restoring the previous version of the drivers that were working fine before the software patch was deployed. The software patch may have caused compatibility issues or corrupted the drivers, resulting in display problems