Answer:
A lot of things.
Explanation:
Trials should be fair and just, confessions should not be brought upon by torture because it could be far from the truth, children can be influenced greatly by peer pressure to say things that are far by true, and hysteria is a real thing.
They knew that people were going to change, and that the Constitution had to change with them. In order to be a working document, it had to be changed to reflect what was going on. At the same time they wanted changes to be taken seriously so they made it difficult to change things.
Answer:
C. competition from outside the US
