Here's a problem to solve: Currently, Antarctica is the coldest and driest place on Earth. Paleontologists have found dinosaur fossils in rock layers below the ice. Based on this evidence, which is a reasonable conclusion about the climate of Antarctica in the past?

Among the 4 following options, which is the correct answer?

- A: Antarctica has always had the same climate as at present.
 
- B: At some time in the past, Antarctica was a hot, dry desert.
 
- C: At some time in the past, Antarctica was much warmer and wetter.
 
- D: At some time in the past, Antarctica was colder and wetter than it is now.
 