In Which of the Following Scenarios Can an Employer Summarily

In which of the following scenarios can an employer summarily dismiss an employee in a non-union environment for his or her activities outside of the workplace?

A) the employee discloses confidential information on a personal blog
B) the employee has a fight with a neighbour
C) the employee talks to fellow workers about the possible benefits of a union in the workplace
D) the employee attends a union conference