Which of the following changes will increase the amount of CaCO₃(s) in the reaction

${\mathrm{CaCO}}_3\left(\mathrm{s}\right)\rightleftharpoons \mathrm{CaO}\left(\mathrm{s}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)?$

• A

  Removal of CaO(s)

• B

  Removal of CO₂(g) 

• C

  Temperature is lowered 

• D

  Volume of container is decreased