Write the next sentence in this paragraph:

How to calculate the concentration of a solution
Learn the vocabulary.
Concentration is a ratio comparing the amount of one substance to the amount of the entire mixture. For instance, if you plan to mix sugar and vinegar together for an experiment, you'll need to calculate the concentration of sugar in the mixture.

Available choices:
[i] You'll need to know the distinction between sugar and vinegar by heart. Understanding the ratio will help you calculate the concentration.;
[ii] Five parts of sugar is equal to one part of vinegar. Remember you don't have to be a genius to put the same ones together in a ratio.;
[iii] In addition, you can calculate the concentration of food by starting by multiplying the volume of the solution by the concentration of the liquid. Consider the substance measurement by multiplying the volume of the solution by the concentration of the liquid.;
[iv] Here's how each ingredient would be described in the chemistry report : The sugar is the solute, which is the substance being dissolved. You are measuring the concentration of the solute.;
[iv]