The correct answer is C. Control unit.
The control unit is the part of the CPU that fetches instructions from memory, interprets them, and then sends the appropriate signals to the other parts of the CPU to carry out the instructions. It is responsible for controlling the flow of data and instructions within the CPU.
The memory unit is where the CPU stores data and instructions. It is a large array of cells, each of which can store a single bit of data. The CPU can read and write data to the memory unit as needed.
The register unit is a small group of high-speed storage locations that are used by the CPU to store data and instructions that are currently being processed. The register unit is much faster than the memory unit, so it is used to store data and instructions that need to be accessed quickly.
The ALU is the part of the CPU that performs arithmetic and logical operations. It is responsible for carrying out the instructions that are fetched from memory by the control unit.
Therefore, the control unit is the section of the CPU that selects, interprets and sees to the execution of program instructions.