12. A multiloop circuit has just one battery with a terminal voltage of 12 V. After leaving the positive terminal of the battery, a wire takes you to a junction where the current

(and circuit) splits into three wires, each containing two resistors. Later on, the three arms of the circuit rejoin and then are connected to the negative terminal of the battery. As you traverse each wire/resistor arm separately leading to the final junction, what can you say about the sum of the voltages across the two resistors in each wire:

(a) they all total +12 V,

(b) they all total −12 V,

(c) they all total less than 12 V in magnitude.