The correct answer is: B. Magnetic bubble storage
Magnetic bubble storage is a type of non-volatile computer storage technology that was developed in the early 1970s. It uses small magnetic domains, or bubbles, to store data. The bubbles are created and manipulated by an external magnetic field. Magnetic bubble storage was once a promising technology, but it was eventually superseded by other technologies, such as magnetic disk storage.
Punched paper tape is a data storage medium that consists of a long strip of paper with holes punched in it. The holes represent data, such as characters or numbers. Punched paper tape was once widely used in computers, but it has been largely replaced by other technologies, such as magnetic tape and magnetic disk storage.
Magnetic tape is a data storage medium that consists of a long strip of magnetic tape. The tape is coated with a magnetic material, and data is stored on the tape by magnetizing the material. Magnetic tape was once widely used in computers, but it has been largely replaced by other technologies, such as magnetic disk storage.
Magnetic disk is a data storage medium that consists of a rotating disk coated with a magnetic material. Data is stored on the disk by magnetizing the material. Magnetic disk is the most common type of data storage medium used in computers today.
E. None of the above is not the correct answer.