The correct answer is: A. Input
Input is the data that is entered into a computer program. It is the information that the program needs to process in order to produce an output.
Output is the result of processing input. It is the information that is produced by a computer program.
Processing is the manipulation of input data to produce output. It is the steps that a computer program takes to convert input into output.
Purpose is the reason for which something is done. It is the goal or objective of a computer program.
None of the above is the correct answer because it does not match the definition of input.