The correct option is B stabilizes an emulsion
In order to prepare stable emulsions, it is important to add a third component known as emulsifier or emulsifying agent in suitable amounts. Several types of emulsifiers are listed below:
(i) Long chain compounds with polar groups such as soap, sulphonic acid, sulphates etc.
(ii) Most of the lyophilic colloids also act as emulsifiers such as glue, gelatin etc.
(iii) Certain insoluble powders as clay, lamp, black etc.
(iv) Soluble substances like iodine also act as emulsifiers.