The two-wattmeter method is used to measure the total power in a balanced circuit powered by a 415 V, 50 Hz, three-phase, balanced power supply. If one wattmeter reads 4.5 kW and the other reads zero, the total power calculated will be _________.

• A. 4.5 kW
• B. 0 W
• C. -4.5 kW
• D. 9 kW