Your question isn't clear if you would explain your question I will answer you!
Answer:
C
Explanation:
Things that were directly written or said are examples of primary sources, the memoir was written directly by the prime minister
Answer:
sorry I don't know but I think you know it better than me
Answer:
I would say the second one.
Explanation:
If both put up wall neither of them can trade goods and that can start a war between both nations until the resolve it by needing eachother goods.