Answer:
C
Explanation:
Back then they didn't have phones, so the news traveled slowly. I also took the exact question on an exam and the actual answer is C
Answer:
Trading with them, especially Japan and Korea and Teaching them to become monks.
Explanation:
The Tang Dynasty interacted with foreigners by Trading with them, especially Japan and Korea and Teaching them to become monks. The Tang Dynasty is one of the most powerful imperial dynasties in the history of China. The Tang dynasty is known for its invention of gunpowder and woodblock printing. The tang dynasty ruled for many decades in the history of ancient China and also spread their culture, belief, and ideas over Asia.
Turbidity. As your book/question states it is a measurement of cloudiness in water.