If the voltage and current in an AC circuit are represented as \(v = 240\sin \left( {314t - \frac{\pi }{6}} \right)\) and \(i = 40\sin \left( {314t + \frac{\pi }{3}} \right)\), then the power factor of the circuit is:

• A. 30° leading
• B. Unity
• C. Zero lagging
• D. Zero leading