Which of the following should a supervisor do to discourage unions?
A. Promise employees that they will receive favorable terms or conditions of employment if they forgo union activity
B. Threaten employees with harsher terms and conditions of employment or employment loss if they engage in union activity
C. Limit direct contact with employees
D. Interrogate employees about pro-union or anti-union sentiments that they or others may have
E. Report any direct or indirect signs of union activity to a core management group
