A is the correct answer.
Okinawa was seen as the final piece in the Pacific puzzle. After Okinawa, US troops began massing in China for an invasion of Japan. This ultimately didn't happen as Atomic weapons were dropped.
For people to be free, so they themselves have equal rights.
They could solve it. According to them, only 1 representative from each state would be in the congress. With 13 states, 9/13 yes votes would be needed to make something a national law. The articles could abolish slavery federation wide if 9 states out of 13 vote to abolish it.
The populist party most clearly represents the needs of farmers.