Answer: The correct answer is a thick wire.
Step-by-step explanation:
In the given options of the problem, a car battery is needed to generate an electrical current. It forces the electrons to flow. It makes the current flow in the circuit.
Solar cell is a device which converts the solar energy into the electrical energy. It can increase the voltage and generate an electrical current.
Generator is a device which converts the mechanical energy into the electrical energy. It can increase the voltage and generate an electrical current.
A thick wire is not used to increase voltage and generate an electrical current. The thick wire has low resistance in comparison to the thin wire.
Therefore, the correct option is (B).