I would like to guess the answer is distilled water but I'm not positive
I am pretty sure it is C but correct me if I'm wrong hope this helps.
When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. Old, dense crust tends to be subduction back into the earth.
Answer:
Nile is the longest river in the world.
Explanation: