The most significant contribution of the shang dynasty was

gunpowder
writing
kites
the great wall

The correct answer is B. Writing

Explanation:

The Shang Dynasty was one of the earliest dynasties that existed in Aisa, this dynasty ruled during the 16th century BC and during this period of time, there were multiple palaces, ritual sites and also different artifacts from different materials were created. Besides, it is believed it was during this dynasty Chinese writing was created as different objects such as bones or turtle shells with inscriptions that belong to this dynasty were discovered and that is believed was the basis for the development of subsequent writing system, which is considered as the most important contribution of the Shang dynasty. Therefore, the most significant contribution of the Shang Dynasty was writing as during this dynasty the first writing system in this area was developed.

#1 im pretty sure its a.

there has only been 12 presidents. the 12th president is/was moon jae-in