The Great Wall of China is one of the most famous landmarks in the world. The Great Wall is made up of many different walls and fortifications built over the course of more than two thousand years. Which sentence would maintain a consistent tone if added to the paragraph?

Even though it wasn't built all at once, the Great Wall is still pretty amazing.

If I ever go to China, you can bet I will visit the Great Wall.

The Great Wall is so big that I bet you could see it from space.

The Great Wall is over 13,000 miles long.