Answer - B - The most likely cause of the problem here is that the installation CD-ROM is damaged.
Key Takeaway: The computer BIOS maintains a boot device priority that defines where the operating system should be found. Most systems are set to boot off the hard drive first, and the CD-ROM drive second if it cannot find an operating system. If the system shows an error message, it was unable to find the installation CD-ROM. The first thing to check would be the installation CD-ROM.