The value of $K_{C}$ for the equilibrium reaction: $CO_{2(g)} + C_{(s)} \rightleftharpoons 2CO_{(g)}$ at $T \ K$ is $0.036$. If the equilibrium concentration of $CO_{2(g)}$ is $0.004 \ M$,the concentration of $CO_{(g)}$ in $mol \ L^{-1}$ is:

• A
  $3.6 \times 10^{-2}$
• B
  $2.0 \times 10^{-2}$
• C
  $1.2 \times 10^{-2}$
• D
  $1.2 \times 10^{-3}$