The thing which must occur before a treaty can go into effect fully, according to the provisions of the United States Constitution is:
According to the given question, we are asked to state the thing which must occur before a treaty can go into effect fully, according to the provisions of the United States Constitution
As a result of this, we can see that a treaty is an agreement which is signed between two parties and in this context, it would need the involvement of another country, where conditions would have to be met before the treaty goes into effect and the president needs at least two third majority vote from the Senate.
Therefore, the correct answer is option A
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