When copper(II) carbonate is heated, it decomposes to produce copper(II) oxide and carbon dioxide gas. The reaction equation is given as shown. $\text{CuCO}_3 \rightarrow \text{CuO} + \text{CO}_2$. A mass of $31.0\,\text{g}$ of copper(II) carbonate is heated until every part of the test-tube contents changes from green to black. The mass of copper(II) oxide obtained is $17.5\,\text{g}$. Calculate the percentage yield.
- A$19.02\%$
- B$21.88\%$
- C$56.50\%$
- D$87.50\%$