12. The diagram above shows part of a closed electrical circuit. When there is a steady current in the circuit, the amount of charge passing a point per unit of time is
(A) greater in the 1Ω resistor than in the 3Ω resistor
(B) greater in the 1Ω resistor than in the 2Ω resistor
(C) greater in the 2Ω resistor than in the 3Ω resistor
(D) greater at point X than at point Y