Freshwater fish are in a hypotonic environment. How do their gill chloride cells function in this environment?

A)Freshwater fish have chloride cells that actively move chloride ions out of the gills into the surrounding water, with sodium ions following.
B)Freshwater fish have chloride cells that actively move chloride ions out of the gills into the surrounding water, with sodium ions moving in the opposite direction.
C)Freshwater fish have chloride cells that actively move chloride ions into the gills, with sodium ions following.
D)Freshwater fish have chloride cells that actively move chloride ions into the gills, with sodium ions moving in the opposite direction.