(Fill in the blanks) Benzoic acid can be extracted into water from an organic solvent using _________ and then removed from the water into an organic solvent by the addition of _________.
* A. Sodium bicarbonate / sodium hydroxide
* B. Hydrochloric acid / sodium hydroxide
* C. Hydrochloric acid / sulfuric acid
* D. Sodium hydroxide / hydrochloric acid