Which of the following definitions follow the format term=class+distinguishing characteristic?
A. A computer consists of a motherboard, central processing unit (CPU), input-output units, memory (RAM and ROM), and storage (SSD or HDD).B. Computers can be personal, desktops, laptops, tablets, hand-held, servers, workstations, mainframes, wearable, or supercomputers.C. Computer once meant a person who did computations, but now the term almost universally refers to automated electronic machinery.D. A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.​