Concept:Digital computers process data using discrete binary values: 0 and 1.Explanation:All data in a digital computer, including numbers, is stored and represented as strings of binary digits, known as bits.Option A is not true for every digital computer.Option B describes analog computers, which use continuous measurements of physical quantities.Option D is too narrow because digital computers are used for many different purposes.Answer:C. They represent numbers through a string of binary digits.