The correct answer is D. MSCDEX.EXE is a CD-ROM DOS driver. It is a dynamic link library (DLL) that allows DOS to access CD-ROM drives. It was originally developed by Microsoft and is included with all versions of MS-DOS since version 5.0.
A. Configures hard drives is incorrect. MSCDEX.EXE does not configure hard drives. This is done by the BIOS or by a separate hard drive configuration utility.
B. it’s a SCSI driver is incorrect. MSCDEX.EXE is not a SCSI driver. SCSI drivers are used to control SCSI devices, such as hard drives and CD-ROM drives. MSCDEX.EXE is a CD-ROM DOS driver, which means that it is used to control CD-ROM drives in DOS.
C. BIOS setup is incorrect. BIOS setup is a program that is used to configure the BIOS. The BIOS is a set of instructions that are stored on a chip on the motherboard. It is responsible for initializing the hardware and loading the operating system.
E. None of the above is incorrect. MSCDEX.EXE is a CD-ROM DOS driver.