Horseshoe crabs, or Limulus polyphemus, are very common along the east coast of the US. Fossils of horseshoe crabs have revealed that they have changed very little in the past 300 million years. Which statement best explains why this is the case?
A.Horseshoe crabs have a low reproductive rate.
B.Horseshoe crabs need to change only if humans are present in their environment.
C.The horseshoe crab is well adapted to its environment. and its environment has not changed much in the last 300 million years.
D.Horseshoe crabs have a high mutation rate.