A coloured dye is separated using chromatography. One constituent of the dye travels a distance of $13\,\text{cm}$ and has an $R_f$ value of $0.86$. How far did the solvent front travel?
- A$6.6\,\text{cm}$
- B$11.9\,\text{cm}$
- C$15.1\,\text{cm}$
- D$21.6\,\text{cm}$