D that's super easy and I am in elemantry school
Explanation: Advantages. Some historians have suggested that two-party systems promote centrism and encourage political parties to find common positions which appeal to wide swaths of the electorate. It can lead to political stability which leads, in turn, to economic growth.
Answer:
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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.