Answer: A type of CPU that can recognize as many as 100 or more instructions, enough to carry out most computations directly
Explanation: Complex instruction set computer(CISC) is the computer device that performs the task of multiple execution through a single instruction.The instruction set present in CISC can range from simple to complex category.They can execute the numerous complex instruction efficiently.
Other options are incorrect because CISC does not perform every arithmetic function,does not helps functioning of hardware via software and does not execute function of software through interpretation of hardware.