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The correct answer is letter A. a treaty signed by 190 countries whose goal is to limit the spread of nuclear weapons.

Here are the choices.
A. a treaty signed by 190 countries whose goal is to limit the spread of nuclear weapons 
B. a treaty signed by five countries after World War II pledging not to use nuclear weapons 
C. a treaty signed by the US and Soviet Union to freeze the number of ballistic missiles 
D. a treaty signed by the US and North Korea to reduce the number of nuclear warheads

A. a treaty signed by 190 countries whose goal is to limit the spread of nuclear weapons

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