Read the passage carefully and choose the correct answer style="text-a

Read the passage carefully and choose the correct answer style="text-align: justify;"> The Great Wall in China is also considered one of the wonders of the world. The Great Wall started as earth works was set up to protect the country from invaders. Qin Shihuangdi, First Emperor of Qin began conscripting peasants, prisoners, and any other citizens to go to work on the Wall. He sent armies to the Wall to stand guard over the workers as well as to defend the northern boundaries. The tradition lasted for centuries. Each dynasty added to the height, breadth, length, and elaborated the design mostly through forced labor. style="text-align: justify;"> It was during the Ming dynasty (1368-1644) that the Wall took on its present form. The brick and granite work was enlarged and sophisticated designs were added. The watch towers were redesigned.  style="text-align: justify;">Over the past few centuries, the Great Wall has served as a source of building materials for local farms and villages.  Question 36: The Great Wall in China was built ____.