Reverse Osmosis Is

Reverse osmosis is:

A) the process of vaporizing and condensing a liquid to purify or concentrate a substance or to separate a volatile substance from less volatile substances.
B) a process by which water is forced through a semipermeable membrane that acts as a molecular filter.
C) a process that removes ions to produce mineral-free deionized water.
D) a process used to convert a liquid or a volatile solid into vapor.