Which best describes the connection between the United States, China, and the Strategic Arms Limitation Talks (SALT I) agreement?

SALT I was negotiated between the United States and the Soviet Union, not China. Nixon’s opening of relations with China increased Soviet concern about being isolated, giving the United States leverage in its negotiations with the Soviet Union. Therefore, the best choice is “Nixon used the new US closeness to China to negotiate the agreement with the Soviet Union.”

AI-written and checked against the verified answer.