According to Map 7-1, under the Qin Dynasty

Question

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Map 7-1 shows that the Great Wall marks the northern boundary of the Qin state during the Qin Dynasty. Option A and D are both incorrect because Xian and Guangzhou are both located in the central area of the Qin state, not in the far south. Option C is incorrect because the Great Wall was mainly built to protect against invasions from northern nomadic tribes, and therefore is not likely to mark the western boundary of the Qin state.

According to Map 7-1, Under the Qin Dynasty