All citizens are required to pay taxes.
The Constitution recognized natural rights. Hope this helps.
The Answer would be 3. those brought through the space trade in Africa.
It makes them more independent. If they had a limitless amount of terms, they could just vote for whatever was suitable at that time and keep their political power. Since they won't be able to stay in the congress longer, then they can vote whatever they want because there's nothing that will affect whether or not they get elected again.