The correct answer is: A. Copper lugs
Copper lugs are used to connect the commutator segments to the armature conductors. They are made of copper, which is a good conductor of electricity. The lugs are crimped onto the ends of the conductors, and then they are soldered to the commutator segments. This ensures a good electrical connection between the commutator segments and the armature conductors.
B. Resistance wires are not used to connect the commutator segments to the armature conductors. They are used to create a resistance in the circuit. This resistance helps to control the flow of current in the circuit.
C. Insulation pads are not used to connect the commutator segments to the armature conductors. They are used to insulate the commutator segments from each other. This helps to prevent the commutator segments from touching each other, which could cause a short circuit.
D. Brazing is not used to connect the commutator segments to the armature conductors. It is a method of joining metals by melting a filler metal into the joint. This method is not used to connect the commutator segments to the armature conductors because it would not provide a good electrical connection.