Among the major achievements of the Shang were the development of a written language and the A. building of the Great Wall.
B. introduction of metal coins.
C. invention of the seismometer.
D. development of bronze metalworking

D. development of bronze metalworking

Explanation:

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.