The correct answer is C. 16-bit.
The Motorola MC6800 is a 16-bit microprocessor that was introduced in 1974. It was one of the first microprocessors to be widely used in personal computers, and it was also used in a variety of other applications, including embedded systems and video game consoles.
The MC6800 has a 16-bit data bus and an 8-bit address bus. It has a 16-level instruction set and a 16-bit accumulator. The MC6800 was originally manufactured by Motorola, but it has also been manufactured by other companies, including Rockwell International and Freescale Semiconductor.
The MC6800 was a popular microprocessor in the 1970s and 1980s, and it is still used in some applications today. It is a relatively simple microprocessor, but it is still capable of running a variety of programs.
The other options are incorrect. Option A is incorrect because the MC6800 is a 16-bit processor, not a 4-bit processor. Option B is incorrect because the MC6800 is a 16-bit processor, not an 8-bit processor. Option D is incorrect because the MC6800 is a 16-bit processor, not a 32-bit processor.