Which of the Following Is an Example of an Employer

Which of the following is an example of an employer unfair labor practice?

A) Ken, the union representative, causes threats to employees of bodily injury.
B) Donna, a supervisor, pretends to spy on union meetings.
C) Bob, a union member, terminates an existing contract and strikes for a new one without informing the employer.
D) Ben, a worker, causes discharge of an employee who spoke out against a contract proposed by the union.
E) Genna, a nonunion employee, causes a member to include illegal provisions in a contract.