The two countries that signed the limited test ban treaty in 1963 is the United States and the Great Britain. Option C and D are correct.
A ban treaty is a treaty that is imposed in the prohibition of the Nuclear Weapons or the Nuclear Weapon Ban Treaty.
It is the initial legally costive international agreement to comprehensively forbid nuclear weapons, with the ultimate goal being their total.
On August 5, 1963, the Limited Test Ban Treaty was sign over by the United States, Great Britain, and the Soviet Union.
Therefore, options C and D are correct.
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