Answer:
C
Step-by-step explanation:
China's overdependence on the Soviet Union in the 1950s and 1960s resulted in strained relations with the Soviets. China felt that the Soviet Union was not providing enough support to the Chinese Communist Party and accused them of revisionism. This led to a split between the two countries and a cooling of relations.
As a result, China sought to improve its relations with other countries, including the United States. This led to the historic visit by President Richard Nixon to China in 1972, which marked a major turning point in U.S.-China relations.