The correct answer is B) reduced voltage and increased current. In a step-down potential transformer, the secondary voltage is lower than the primary voltage, while the secondary current is higher than the primary current. This is due to the principle of conservation of power, where the input power must equal the output power. To achieve a lower secondary voltage, the secondary current must increase to maintain the same power level. The other options are incorrect: A) is incorrect because the secondary voltage is reduced, not the current. C) is incorrect because the power (kVA) is maintained, not reduced. D) is incorrect because the secondary current is increased, not reduced.