Which If Any,of the Following Examples Does NOT Describe a Potentially

Which if any,of the following examples does NOT describe a potentially violent employee?

A) An employee holds a grudge against a co-worker.
B) An employee is stalking a co-worker.
C) An employee is extremely frustrated because he can't master a computerized assembly line painting system.
D) An employee is depressed because his mother recently dieD.
E) All of the above examples illustrate a potentially violent employeE.