The theory of evolution is controversial among some people, but not among scientists. Lots and lots of evidence support this theory. Some of the strongest evidence comes from the fossils of other hominids - human-like skulls, for example, have been found on many continents, revealing that we didn't always look the way we look now. We can also see why we evolved the way we did. For instance, humans (and other great apes) didn't grow thumbs because we thought they'd make it easier to pick things up. Instead, a series of likely hundreds of slight mutations moved the thumb to its current place because those animals with opposable thumbs were better able to survive and reproduce. That's what evolution is all about: tiny changes in organisms of a species over a huge amount of time. Which of these would provide the best evidence for the theory of evolution?

A
fossils of ancient tigers that had larger ears than tigers have today

B
oil found deep under the ice sheets of Antarctica

C
a person’s hair growing faster in the summer than it does in winter

D
ancient maps that show that countries had different borders long ago