An aqueous solution is prepared by dissolving $3.4\,\text{g}$ of sodium hydroxide, $\text{NaOH}$, and making the total volume up to $500\,\text{cm}^3$ of solution. What is the concentration, in $\text{mol dm}^{-3}$, of this sodium hydroxide solution?
- A$0.0068$
- B$0.085$
- C$0.17$
- D$6.8$