Answer:
Amnesty international is the group which works to help get pardons for past offenses.
They should because they are the ones that pass the laws. They should have a more active role, and know more about what is happening around them so they can make better choices.
The Indian removal act was to allow President Andrew Jackson to negotiate with southern tribes for their removal to western lands. There was nothing in the west to help them prosper so a lot of the Native Americans died along the way (trail of tears). Im an enrolled member of the Crow Tribe so I'm pretty educated in these departments. Hope this helps!
Some limitations when determining the cause of an event are that other sources that are linked to the event in the same time can usually say things different; It is especially difficult if there is no solid base to the cause and no photographic or written evidence.
It is (d.) the Hajj since it is the fifth pillar.