Limestone contains calcium carbonate (CaCO3), which is reactive with hydrochloric acid (HCL). The graph shows that large chips of limestone take longer to react with a dilute solution of hydrochloric acid than the small limestone chips do. An investigation was performed with equal masses of different-sized chips. Which statement BEST explains the observation from the investigation?

Group of answer choices

Larger chips have more impurities.

Smaller chips have a larger surface area.

Larger chips have more calcium carbonate.

Smaller chips are less concentrated.