Fact 1: Running water is better able to dissolve oxygen and nutrients than standing water.

Fact 2: Also, running water in rivers is the major force of erosion on the surface of the earth.

Given the two facts above, answer the question "Which body of water would be able to  dissolve oxygen and nutrients the best?" with the following options: 
- NaCl
 - Lake
 - Puddle
 - Pond
 - rain
 - CO 2
 - River
 - sugar


 

       River  