Compound M contains calcium. Two reactions for M are shown below. - When M reacts with dilute hydrochloric acid, a salt and water only are produced. - When M reacts with aqueous ammonium chloride, a gas is formed that changes damp red litmus paper to blue. What is M?
- A$\text{CaOH}$
- B$\text{Ca(OH)}_2$
- C$\text{CaCO}_3$
- D$\text{Ca(CO}_3)_2$