I am not positive of your question but if you are asking what is the way to make your sentences differ from one another. Transitional verbs such as then, therefore, another argument, etc.
I think it will be number 4
First person pointer view is the answer
Explanation:
The legal right to express one's opinions freely, is what freedom of speech is, so shouldn't be to hard. Just express how you feel about something. I know it's not a complete answer, but might help some.