explanation: hope this . : -)
the correct answer is b. the spread of epidemic diseases.
the correct answer is definitely china.
indeed, on september of last year china created a separate payments system that will enable it to trade with iran, circumventing the us embargo. the chinese yuan is now the third largest reserve currency in the world. chinese government bonds are exponentially becoming a popular international investment option and yield a 3.7% return rate for the 10 year category which is one of the highest yields in the world, surpassing the us (3%). china’s economy is the second largest one but its growth rate (gdp rate) is superior to the us growth rate. china’s rate is 6.3% while the us’ is 2.5%
finally, china spends hundreds of millions in industrial espionage of western corporations, especially us based ones.