I'd go with d, Americans were indifferent I had that question on a test so it should be right and if you are having trouble with other courses I'd be obliged to help you.
Hope this helps.
Answer:
A German u boat sunk an American cargo boat
Explanation:
Answer: C
Explanation:
The answer is C because this is when they first bagan to make crops and farm. Before they used to always move around because they were hunters.