The correct answer is: A. Performs the arithmetic-logic and control functions.
A microprocessor is a small computer processor that incorporates the functions of a computer’s central processing unit (CPU) on a single integrated circuit, or a small number of integrated circuits. Microprocessors contain both combinational logic and sequential digital logic, and operate on numbers and symbols represented in the binary numeral system.
Microprocessors perform arithmetic and logical operations, control the sequencing of operations, and input and output data. They are used in a wide variety of applications, including personal computers, smartphones, and automobiles.
Option B is incorrect because there are many other chips in a PC system, such as the memory, graphics, and storage chips.
Option C is incorrect because microprocessors can operate on data at different bit sizes, depending on the instruction set architecture (ISA) of the microprocessor.
Option D is incorrect because the primary storage function is performed by the memory chips.
Option E is incorrect because the answer is A.