Which of the Following Is an Example of Natural Selection

Multiple Choice

Which of the following is an example of natural selection?

A) birds that evolve a new beak shape in order to exploit a different food source
B) the extinction of the mammoths due to hunting by a new predator
C) fossils of trilobites that have the same morphology but are separated by millions of years
D) the mass extinction of the dinosaurs due to a meteorite's impact 65 million years ago