The correct answer is: A. All Input, Output and processing.
The CPU is the brain of the computer. It is responsible for carrying out the instructions of the computer program. The CPU does this by fetching instructions from memory, decoding them, and executing them. The CPU also controls the input and output devices of the computer.
Option B is incorrect because the CPU does not control memory. Memory is controlled by the memory controller.
Option C is incorrect because the CPU is not controlled by the input data. The input data is processed by the CPU.
Option D is incorrect because the CPU does control all input, output, and processing.