The main reason why the US joined the war was because multiple attack on passenger and merchant ships with submarine attacks .The final straw was when the RMS Lusitania by a German u-boat going to Liverpool England .
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.
The government has more power then the Roman
Private citizens had to pay higher taxes for each runaway slave.
The official power to make legal decisions and judgements
