Hey there!
Claim means to declare, so I believe your answer would be affirm.
Hope this helps! :)
Have a great day!
The answer would choice C, between the Tigris and Euphrates rivers.
You don't have any context to what you're saying but I can give you some examples. A person in the United States(presumably in Texas) freely owning a gun with a permit. Another would be in certain parts of Spain, where it is legal to have no clothes on.
The main way in which mercantilism increased the likelihood of conflicts between European powers was that it led to dispute over who could trade where, and disputes over the trade agreements themselves, since every country wanted the "best deal".