Of the given choices provided, option C would be the best answer to this problem.
This is because the Han Dynasty created the first trading system for China and Europe.
The Shang Dynasty created China's first monetary system with copper, sliver (etc.) coins. Therefore option "A" is incorrect.
The Shang Dynasty also created China's first system of writing known as "hanja" which was invented in 4800 Before Christ(B.C.). That proves that option "B" is also incorrect.
The Ming Dynasty invented the Great Wall of China. This wall was constructed to keep intruders from getting in to China and attacking there armies and people. This massive wall was built in 221 B.C. This massive wall was around 2,145 miles long. Built by the Ming Dynasty and not the Han Dynasty proves that option "D" is also incorrect, which means that C is your correct answer.
The first trading system with China and Europe was created by the Han Dynasty. Which is option "C"