________ can exist without ________, but ________ cannot exist without ________.
Acurrent, voltage; voltage, current
Bvoltage, current; current, voltage
Ccurrent, resistance; resistance, current
Dresistance, current; current, resistance
Acurrent, voltage; voltage, current
Bvoltage, current; current, voltage
Ccurrent, resistance; resistance, current
Dresistance, current; current, resistance