The answer is D because you want to have a control group! Hope it helps!
Public family is out their and private is to themselves duh lol
Answer:
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Explanation:
The Silk Route was a series of ancient trade networks that connected China and the Far East with countries in Europe and the Middle East. The route included a group of trading posts and markets that were used to help in the storage, transport, and exchange of goods. It was also known as the Silk Road.
D. The United States Department of the Interior