Technician exam question T0B10

WhyWhen installing grounding conductors used for lightning protection, sharp bends must be avoided. Lightning surges travel poorly around sharp bends, since the fast rise time of the surge current makes a sharp corner act like added impedance, so grounding conductors for lightning protection should be routed as straight and gently curved as possible, answer C. Insulated wire (A) isn't required and doesn't affect this behavior, precise right-angle bends (B) are exactly the sharp-bend problem this rule warns against, and common ground points are actually preferred, not avoided (D), for keeping everything at the same potential.