I still kinda disagree with 14 though.. I think its B...
"Therefore,
freshwater fish are constantly excreting water through their gills and never drink to keep the body salts non-diluted."
source:
http://fish.mongabay.com/anatomy.htm
Alot of sources have stated that the gills are responsible for the excretion of water and most of the nitrogenous wastes.... the kidney however maintains ions in freshwater fish... via absorbing it into its blood...
I'm so confused about 14?... I hope the markers take both answers...