Which of the following is a proper example of natural selection?

• A. Human beings continue to get taller because of thousands of years of proper nutrition.
• B. A community of lady bugs begin having offspring with darker shells, in order to hide from their predators.
• C. Albino rodents die off quickly in a community, being more vulnerable to certain pancreatic diseases.
• D. Seagulls begin to eat so many fish, that only those with a dark blue scale color survive.