(c) The requirement is to identify the part of the computer
that does most of the data processing. Answer (c) is correct
because the CPU, the central processing unit, does the primary
processing for a computer. Answer (a) is incorrect because
the word “analyter” has no meaning in information technology.
Answer (b) is incorrect because a compiler is used to compile a
particular type of computer program. Answer (d) is incorrect
because a printer is an output device.