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Answer:
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.
They can be used to just copy/paste e-mailed information without writing down on a paper and losing valuable time. This is one example.
honestly i think ur answer would be D because it keeps you from flying out of the window
