Answer: hopefully im not too late answer below :)
Explanation: Core muscles ensure the spine and keeps it balanced out. Likewise they can help control developments, for example, strolling and standing. The center helps move vitality and assist us with moving in various ways.
I'm not entirerly sure whether ANY of these statements could be considered untrue.
Socializing up to a certain extent could increase productivity, granted it would be done with work in mind.
B, C, D all are true as these are very commonplace things that can happen at the workplace, while not all are equally probable all of them could happen.
If one really is considered untrue, it most likely would be A.
Volleyball, and Baseball because you need to have power. In volleyball you need power to spike the ball. You need power to hit the ball in baseball.