Answer:
1. Should police have the right to stop protests?
Step-by-step explanation:
That is an arguable topic because you can argue violent protesting, the constitution, etc.
Why not?:
2. You can't use that as an arguable topic because it is a fact that Bull Connor used police dogs on protesters.
3. You can't use that because it is already a fact that curfews are sometimes enforced to discourage protests, we've seen that happen over this last year.
4. You can't use that because, like choice 2, it is a fact.
Hope this helps, let me know if you have any questions :)