How has China grown in prominence since the end of the Cold War?

a. It has threatened the territory of the United States with nuclear weapons. 
b. It has adopted a more democratic policy of freedom and human rights. 
c. It has spread public and private investment to most of the countries in the world. 
d. It has joined with Russia to form a new superpower alliance. 

c. It has spread public and private investment to most of the countries in the world.