Declare a valid variable that can hold numbers in c++

Which of the following is a reason to include the people who will be using the new technology in conversations about technology upgrades for a business? a. the users would likely know if an upgrade would be necessary or even useful. b. the users would know more about the software than people in the it department. c. the users will be paying for the upgrades with their own money. d. the users will assume the upgrade will cause a drop in productivity.