Which of the following achievements is attributed to China's Han dynasty during the classical era?

A. Standardizing China's currency and written language for the first time

B. Establishing the mandate of heaven philosophy of government

C. Spreading the ideas of Confucius to promote social tranquility in China

D. Joining trade routes between China and Europe through the Silk Road

Some of the developments during this hina's Han dynasty include:

B. Establishing the mandate of heaven philosophy of government

D. Joining trade routes between China and Europe through the Silk Road

Explanation:

China's Han dynasty of 202 BC was known as the Golden era. Emperor Gaozu started the era which saw lots of advancement made by the Han dynasty in the development of today's China.

Moreover, they made lots of development during this reign which are the invention of the Silk Road, the invention of papers, development of the civil service, seismograph, and scientific advancement.

B. Establishing the mandate of heaven philosophy of government

D. Joining trade routes between China and Europe through the Silk Road

Explanation:

The Golden era was all attributed to China's Han dynasty. The development in china today owes a huge chunk to the advancements that occurred during the Emperor Gaozu's time.

Additionally, silk road, development in civil services, technological and scientific advancements and advent of paper were all fruits of that era.

Therefore the correct answers are option B and option D.