Question

how could we lower the resistance of the wires in this circuit?
cool the wires down
use nonconductive wires
use longer wires

Explanation:

According to the given information about resistance factors (length, diameter, material, temperature), cooling the wires (lowering temperature) reduces resistance. Non - conductive wires would increase resistance (as conductors have lower resistance than non - conductors). Longer wires increase resistance (shorter wires have lower resistance).

Answer:

Cool the wires down.