A Large Pond on a Farm Contains Blue Gill and Some

A large pond on a farm contains blue gill and some crayfish. The pond is not very deep, and with the changing seasons, the temperature of the water can vary substantially. Based on this, which of the following is true?

A) More oxygen is available during the winter months.
B) Both blue gill and crayfish breath less during the summer months.
C) Less oxygen is available during the winter months.
D) Temperature impacts animal physiology, but not the availability of oxygen.