Three lamps that are all identical and three ammeters are arranged as illustrated. The ammeter readings are $I_1$, $I_2$ and $I_3$. In what way are the readings connected?
- A$I_1 = I_2 = I_3$
- B$I_1 > I_2$ and $I_2 = I_3$
- C$I_1 > I_3 > I_2$
- D$I_1 > I_2 > I_3$