A CPU is the electronic circuitry within a computer that carries out the instructions of a computer program by performing basic arithmetic logical, control and input/output operations specified by the instructions.
Knowing this, the answer is both C - That it coordinates the flow of instructions and data within computers, And A - That a control unit performs arithmetical and logical computations.
If you can only select one answer, I'd personally go with A.
D. Because if you show the owner the graph he'Il be impressed so he'll obviously want proof so show him the other store owners success quotes and then for him to trust you, Give him a trial of the product
It's VPN(Virtual Private Network). It allows company to have private network at the same time secure. While others are not that secure.