It is many years in the future. The shoreline waters have remained shallow. What prediction would you make about the bird population in the area?

A) Within the population, the average leg length has increased over time.
B) Within the population, the range of leg length has remained constant over time.
C) According to Darwin, variation exists so we would expect a variety of leg lengths in the population.
D) The increase in long-legged birds led to increased competition and the number of birds dropped dramatically.