You find a lake that is 50 meters in diameter while you are exploring part of a very arid environment in the southwest United States.You have surveyed 100's of kilometers of this habitat and found no other lakes.It appears to be fed by some underground seep.In it there are many small fish.Which of the following best describes these fish?
A) These fish are semelparous annual B) The fish are a population C) These fish are semelparous perennial D) The fish are likely modular