The answer is A. More flexibility and convenience
The reason that A is the correct answer is because POS systems elevate the need for price tags that must be typed in, making checkout a much speedier process. It also allows a simplified process for counting inventory and the transfer of product from one location to another. In addition to all these functions it also implements discounts easier and gives the foundation for a customer rewards program.
All of these features allow for more flexibility and convenience as answer A states.
