General exam question G5A12

WhyAt resonance in an LC circuit, inductive reactance and capacitive reactance cancel each other. At resonance, an LC circuit's inductive reactance and capacitive reactance are equal in magnitude but opposite in sign, so they cancel each other, leaving the circuit's behavior governed by whatever resistance remains, answer D. Current and voltage aren't necessarily equal to each other (they're different physical quantities with different units), resistance itself isn't cancelled, only reactance is, and an LC circuit at resonance doesn't inherently radiate all its stored energy as radio waves, so A, B, and C don't describe what actually happens.