I did some research and the lowest range was 1,000,000 and the highest was 1,700,000. Its hard to estimate this because they didnt have the proper recording instruments we have today.
The answer is A.) the Boston Tea Party, because the colonists dumped a lot of tea in the ocean, in protest of the tea act
D. All were concerned with religious liberty
The ruler of Japan invaded to secure his legacy and make sure he was remembered I believe.