The correct option is "A", since acupuncture, Chinese dictionary and tree-bark paper were part of the Han dynasty inventions, except writing.
The earliest Chinese writing evidence dates from the late Shang dynasty (c.1600–1046 BC) while the Han dynasty, which developed between 206 BC and 220 AD, invented the Chinese dictionary, the acupuncture, the tree-bark paper, the silk road, the cast iron, the hot air balloon, among other great inventions and discoveries. For that reason, the Han period has been remembered as the Golden Age of China.
