You are presented with the question "A force of water which moves can slowly dissolve carbon in what?" and the following answer choices: 
- sediment
 - an area swollen with pus
 - precipitation
 - loose soil
 - rocky clouds
 - water forces
 - sedimentary rock
 - small bricks

Now knowing that flowing water can slowly dissolve carbon in sedimentary rock and water which moves or flows is a force, choose the best answer.


 

       sedimentary rock  