What Is the Likely Outcome If You Were Able to Force

What is the likely outcome if you were able to force water through fish gills in the opposite direction to how it normally flows over the gills?

A) The blood's oxygen concentration would not be able to exceed 50%.
B) Gas exchange would be inhibited and movement of oxygen into the blood would cease.
C) The direction of blood flow would reverse through the gills to compensate for the reversed direction of water flow.
D) The movement of carbon dioxide from the blood into the water would increase.
E) There would be no effect,and maximal oxygenation of blood would still occur.