An archaeologist analyses the wood in a prehistoric structure and finds that ${\mathrm{C}}^{14}$ (Half-life = 5700 years) to ${\mathrm{C}}^{12}$ is only one- fourth of that found in the cells buried plants. The age of the wood is about

• A

  5700 years

• B

  2850 years

• C

  11,400 years

• D

  22,800 years