In which of the following scenarios would it be deemed that an act of constructive dismissal has occurred?

a) Vera quit her job as a result of her male colleagues consistently making sexually inappropriate remarks in the office.

b) Polly, the sole female employee of a company, quit her job after being subjected to daily harassment owing to her religion.

c) Harry, an assistant Vice President for ten years with his company, was demoted to Line Supervisor during a company restructuring process.

d) All of the above

e) None of the above.