The largest use of the world's water is
recreational
for drinking
agricultural
for sanitation

Recreational for drinking agricultural for sanitation.

So I would say it is C. 
 
 The largest use of the world's water is used for irrigation or agriculture.
This is because the high demand of food thus agricultural products are demanded to supply at a rapid amount in just a short time. The population growth influences mainly the use of resources and one is water. Fresh water only amounts little to the drastic needs of society today and much is used for agriculture as studies suggest. 

Both of them have a nucleus, golgi apparatus, cell membrane, smooth and rough endoplasmic reticulum, lysosome, and ribosomes.