Answer:
Poisonous gases blistered soldiers' skin, eyes, and lungs.
Explanation:
The answer that best applies to both the Tang and Song dynasties would be C. A Reliable food production and distribution system. This gave both dynasties the ability to thrive.
Helios threatened to not shine anymore.
Technically Helios threatened to only shine in Hades, among the dead. However, this is the most similar to what happened in the legend. Therefore it is most likely the correct answer.