Concept:DVD-ROM is a random-access storage medium, so any file can be retrieved directly without scanning earlier data.
Explanation:File organisation defines how records are stored and accessed on a device.
In direct access, the read/write head moves straight to the required location on the disc.
This makes DVD-ROM ideal for random retrieval of files and folders.
Sequential and serial access require reading records one by one from the beginning, which is not how a DVD-ROM works.
Hierarchical organisation describes the directory or folder structure, not the physical file access method on the disc.
Because a DVD-ROM drive can jump to any sector instantly, the correct type of file organisation is direct access.
Answer:A. direct access