The image shows two states of an electric circuit. Read the following statements carefully and choose the correct option that explains the necessary conditions to continue the flow of current in the circuit. A. Presence of a key. B. Completion of the circuit. C. Positive and negative sign on the cell. D. Copper wires attached to the two terminals of the bulb and the cell.
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c ...positive and negitive sign
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c. positive and negative sign on the cell
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