Concept:Windows 10 utilises NTFS as its default and primary file system.
Explanation:NTFS, or New Technology File System, is a journaling file system created by Microsoft.
It is used by Windows 10 by default for system drives.
NTFS supports large file sizes, file permissions, encryption, and disk quotas.
It is more advanced than FAT16 and FAT32, which are older and simpler file systems.
FAT16 works well only with small disks below 1.2GB, while FAT32 is compatible with many operating systems but lacks security and journaling features.
Among the given options, only NTFS is the correct default file system for Windows 10.
Answer:D. NTFS