Correct answer: Option (D)Explanation for correct answer:Rutherford’s alpha-particle scattering experiment led to thediscovery of the atomic nucleus.A piece of gold foil was hit with alpha particles, which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space. Some particles had their paths bent at large angles. A few even bounced backward. The only way this would happen was if the atom had a small, heavy region of positive charge inside it.