During the early parts of Nixon's presidency,
OA. there was a threat of nuclear war from communist nations in Southeast Asia.
OB. China and the United States provided military aid to fight Communist nations.
OC. there was a reduction of tensions between the United States and China.
OD. China and the United States both agreed to increase arms production.

During the early parts of Nixon's presidency, there was a reduction of tensions between the United States and China as part of a diplomatic strategy to strengthen international position.

Explanation:

The early parts of Nixon's presidency were characterized by a significant reduction of tensions between the United States and China, which marked a shift in diplomatic relations and led to increased engagement between the two countries. This period also saw Nixon pursuing closer relations with both China and the Soviet Union as part of a strategy to de-escalate tensions and strengthen the United States' international position.

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