Which of the following choices is least likely to be a warning sign of potential violence?

Being late to work one or two days each week is generally a common occurrence and can result from many benign factors such as personal issues, transportation problems, or simply an occasional lapse in punctuality. This behavior, in isolation, doesn't typically suggest underlying issues related to violence or aggression.

In contrast, the other choices depict more alarming changes in behavior. An increase in aggressive behavior signifies a potential instability or emotional distress, frequent conflicts with others suggest difficulty in interpersonal relationships that could escalate, and isolating oneself from the team can indicate withdrawal or a disconnect that may signal deeper psychological problems. While tardiness may warrant attention, it does not serve as a strong indicator of potential violence compared to the significant behavioral changes suggested by the other options.