Electric current flows through paths called circuits. People often build circuits using wires, resistors, and batteries. A battery is a voltage source. A circuit with which components has the highest current with the given voltages?

For the same kind of circuit, a higher voltage produces more current, and removing resistance allows even more current to flow. Choice C has the higher-voltage 9 V battery and no resistor, so it has the highest current. A light bulb provides resistance, and the 1.5 V battery in choice D has a lower voltage than the 9 V battery.

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