Which PC file system was primarily analyzed by early MS-DOS tools?

The choice that reflects the PC file system primarily analyzed by early MS-DOS tools is IBM PC file systems. In the early days of personal computing, particularly with the MS-DOS operating system, the filesystem in use was FAT (File Allocation Table), which was integral to the IBM PC architecture. Early utility tools developed during this time were designed to work with this simple file structure, which included functionalities for file management like creating, deleting, and accessing files.

The original FAT file system paved the way for subsequent formats like FAT16 and FAT32; however, all of these versions stemmed from the original FAT utilized by MS-DOS. While FAT32 and exFAT came later, they were not part of the early landscape when MS-DOS tools were first created. NTFS, which is a more advanced file system, was introduced first with Windows NT and is not associated with the early MS-DOS era.

Thus, understanding the evolution of file systems and their relevance in the context of the operating systems they were associated with provides clear insight into why the IBM PC file systems are the correct answer in relation to the tools available during the early days of MS-DOS.