General exam question G6A11

WhyAn inductor operated above its self-resonant frequency becomes capacitive. Every real inductor has some stray capacitance between its windings, and above its self-resonant frequency that stray capacitance's reactance dominates, so the component's net behavior flips from inductive to capacitive, answer C. Its reactance doesn't simply keep increasing past that point, operating above self-resonance doesn't inherently generate harmonics, and it doesn't cause catastrophic failure on its own, so A, B, and D are wrong.