Question #N864

The Great Wall of China is one of the most iconic structures in the world. It was built over centuries by different dynasties, each with their own purposes and styles. The wall is a testament to the ingenuity and resilience of the Chinese people.

Which choice best corrects the grammatical error in the sentence?
A. It was built over centuries by different dynasties, each with their own purposes and styles. The wall is a testament to the ingenuity and resilience of the Chinese people.
B. It was built over centuries by different dynasties, each having their own purposes and styles. The wall is a testament to the ingenuity and resilience of the Chinese people.
C. It was built over centuries by different dynasties, each with their own purposes and styles. It is a testament to the ingenuity and resilience of the Chinese people.
D. It was built over centuries by different dynasties, each with its own purposes and styles, and the wall is a testament to the ingenuity and resilience of the Chinese people.