Which BEST describes a third-generation computer?

Which BEST describes a third-generation computer? A. the CPU was used for the first time, computers could be owned by the general public, and a GUI was used B. used operating systems, keyboards, and monitors for the first time, and integrated circuits were used to supply electricity C. used artificial intelligence so that the computers become reasonably intelligent all on their own D. high-level programming languages, magnetic tape and disks for storage, and used small transistors to supply electricity