Final answer:
A DVD, which debuted in 1995, is the disc type with 4.7 GB of digital video capacity. It used to be common for storing information digitally and represented a significant technological advance over its predecessors.
Step-by-step explanation:
The type of disc that debuted in 1995, similar to a CD but with 4.7 GB of digital video capacity, is A) DVD, which stands for Digital Versatile Disc. Before being largely replaced by streaming services, DVDs were very common and used to store information digitally.
The development of DVDs was a significant leap from their predecessors, audio and video cassette tapes, in terms of storage capacity. This evolution in storage technology allowed for vast amounts of data, such as an entire encyclopedia, to be stored on a single disc. DVDs operate by storing information in the form of pits on the disc's surface that are read by a laser.
DVDs provided not only higher storage capacity but also a convenient form factor for movies, software, and other media applications. This disc format contributed significantly to the shift from analog to digital in the field of home entertainment.