In Which Two of the Following Circumstances Might an Employee

In which two of the following circumstances might an employee be treated as owing fiduciary duties to the employer?

A) Where the cleaning supervisor at a bank is given the key to the bank vault containing safety deposit boxes.
B) Where a car mechanic is given special training in repairing batteries in electric cars, and shortly after the training is complete, leaves to set up her own business.
C) Where an employee has been hired to help to develop safety guards for cricketers, and without the agreement of his employers markets his own safety guards on e-bay.
D) Where an employee uses his employer's telephone number to select National Lottery tickets and wins £14million.