answer
correct answer is B. The switches in the CPU
reason:
the switches in the CPU are part of the hardware layer of abstraction in a computing system. the hardware layer consists of the physical components of a computer system, such as the CPU, memory, hard drive, and input/output devices. It is responsible for processing and storing data, and performing other low-level operations. the other options listed are part of the software layer of abstraction, which includes programs, applications, and operating systems that run on top of the hardware layer.