Which East Asian country is a major competitor for US traders?

A. Japan

B. Taiwan

C. South Korea

D. China

''The correct answer is A. China is the East Asian country that is the major competitor of US traders. They run almost everything of the world trade for cheap and large quantities of goods. Everywhere you go in the world, you will see "Made in China" products". (answer from TaskMaster).

I think its china but I am not sure