What was important about ping-pong diplomacy apex?

The ping-pong diplomacy was significant because it demonstrated that China was open to better relations with the United States. This allowed for talks on serious issues on how the two countries could relate. For instance, the vast Chinese markets presented an economic opportunity for the  U.S. economy which was struggling. It was therefore important that the two countries relate better  

the answer is c my brotha. c.   formed an alliance with the soviet union.

the answer is b just took the test