Now I'm not 100% sure here but C is your best bet
It allowed the independent Soviet nations and satelite states to choose democracy over communism
The correct answer to this question is Choice D - A person born in the United States.
According to the passage that goes with the question, a person must be born in the United States in order to be elected president. All of the other choices are outside of the United States, which leaves choice D as the correct one.