正解:D
説明
An unattended installation is a method of installing Windows 10 that does not require any user input or interaction during the installation process. An unattended installation can be performed by using an answer file, which is a file that contains all the configuration settings and preferences for the installation, such as the product key, the language, the partition size, and the user accounts. An unattended installation can be the fastest way to install Windows 10, as it automates and streamlines the installation process. Factory reset, System Restore, and in-place upgrade are not methods of installing Windows 10.