Which Scenario Best Illustrates the Concept of Natural Selection

Multiple Choice

Which scenario best illustrates the concept of natural selection?

A) The gene for sickle cell anemia has been passed down for generations because those with sickle cell anemia are typically resistant to malaria.
B) Farmers typically breed only their strongest animals to ensure that the offspring will retain the most desirable characteristics.
C) The gene for brown eyes is dominant;therefore,the most common eye color in the world is brown.
D) As identical twins age,they typically show more physical differences because of epigenetic processes.