I'm pretty sure (1.) is A, and I know for a fact that (3.) is D because slavery was a regular practice between quarreling tribes. I have no clue what (2.) is. Best of luck.
Answer:
There are so many steps because they need to see if the law is good and worth passing and won't infringe on people' rights. The positives of this process is that they will have time to analyze the law and see the pros and cons. Civilians will also be able to weigh in on the law. The negatives are that even if the law needs to be passed quickly, it can't, because it needs to go through each step.
