Which one of the following is not true concerning socializing in the workplace?

a. socializing can actually increase productivity.
b. socializing can lead to favoritism and friction in the workplace.
c. socializing can keep you from reaching your performance goals.
d. socializing can throw your horizontal relationships out of balance.

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. 

Wash your hands often and recycle your trash instead of just throwing it away.