Answer:
D). Soldiers must be wary of their enemies.
Step-by-step explanation:
In this excerpt, we learn that Odysseus's men had stopped being careful. They were feasting and had relaxed their vigilance, forgetting that soldiers should always be alert in order to defend themselves against their enemies. Sure enough, Odysseus's men were attacked by Cicones's army. This shows how soldiers should always be wary of their enemies.