Explanation: In a pulsed radar system, the average power is the peak power multiplied by the duty cycle. The duty cycle represents the fraction of time the transmitter is actually emitting power. 1. **Calculate the duty cycle:** Duty Cycle = Pulse Width × PRF Duty Cycle = (1 microsecond) × (1000 Hz) Duty Cycle = (1 × 10⁻⁶ seconds) × (1000 pulses/second) Duty Cycle = 0.001 2. **Calculate the average power:** Average Power = Peak Power × Duty Cycle Average Power = (100 kilowatts) × (0.001) Average Power = (100,000 watts) × (0.001) Average Power = 100 watts Therefore, the average power is 100 watts. Options A and C are incorrect as they result from miscalculations of the duty cycle or the final product.