Which of the Following Is Embezzlement

Which of the following is embezzlement?

A) a self-serve gasoline customer drives away without paying for the gas
B) the cashier at a grocery store takes money from his own cash register
C) a receptionist who works in a bank lobby distracts a teller and takes money from the teller without the teller's knowledge
D) a roofing contractor takes a lawnmower from a homeowner while doing a job for the homeowner
E) an electrician working in a client's home takes $100 from the homeowner's desk drawer