The diagram illustrates the apparatus used for separating the various components of a mixture using chromatography. Which statement about this experiment is correct?
- AA locating agent is used to find the position of the solvent front.
- BThe components to be separated must be soluble in the solvent.
- CThe baseline on which the spot of the mixture is placed is drawn in ink.
- DThe $R_f$ value is calculated by $\frac{\text{the distance travelled by the solvent front}}{\text{the distance travelled by the component}}$.