Why Do the Minerals Calcite and Dolomite Bubble with the Mineral

Multiple Choice

Why do the minerals calcite and dolomite bubble with the mineral or its powder are placed in hydrochloric acid?

A) Both minerals are metal hydrides, and when placed in hydrochloric acid they give off hydrogen gas.
B) Both minerals are sulfides, and the acid reacts to release sulfur dioxide gas.
C) The acid reacts with the mineral to release CO₂ gas that is bound into the crystal as carbonate ion.
D) The acid and the mineral together react with oxygen in the air, releasing CO₂ gas.