According to Von Steuben, what does an army need to do to survive?

Explanation:

Von Steuben insisted on reorganization to establish basic hygiene. He demanded that kitchens and latrines be put on opposite sides of the camp, with latrines facing a downhill slope. (Just having latrines was novelty to the Continental troops who were accustomed to living among their own filth.)

d is the answer. leo should include the source.

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration