When term limits have been overturned, the most common method was
a bill passed by the state legislature
a decision by the state supreme court
a voter referendum
a governor’s decree

Option B.

Explanation:

A decision by the state Supreme Court, is the right answer.

A term limit is a statutory limitation that restricts the number of terms a leader may serve in a special elected post. While term limits are observed in presidential and semi-presidential regularities they serve as a way of restricting the potential for monopoly, wherever a conductor completely becomes "president for life".

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i would say b. research typically uses a variety of sources