Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
I believe the answer is False or I may be wrong
People live in the moment and post whatever they want and they just might regret it later on.
Answer:
variable(s) determine the amount of potential energy an object has?
Explanation:
