Which of te following was the clearest precedent for the strategic Arms limitation talks of the 1970s?

The clearest precedent for the Strategic Arms Limitation Talks (SALT) of the 1970s was the Partial Nuclear Test Ban Treaty of 1963. This treaty marked a significant step in U.S.-Soviet relations by establishing a framework for arms control and demonstrated both superpowers' willingness to engage in dialogue to limit nuclear proliferation. Additionally, the Non-Proliferation Treaty of 1968 set the stage for further discussions on strategic arms, reinforcing the importance of arms control efforts leading up to SALT.