Only choice that is related to exploration: <span>b:caraval
</span>
Answer: The yellow river is located at (LETTER B) The structure built to keep out the northern barbarians was called the (Great Wall) and is located at (LETTER C) The Silk Road is located at (LETTER A)
Explanation:
To permanently protect the people of the nation from unreasonable amendment proposals and ratifications
Probably the invention of Papyrus (paper)
