Answer:
D. belief that Americans did not recognize enemy leaders.
Step-by-step explanation:
The poster uses humor to portray the leaders of the enemy countries fighting against the US and its allies. It would help American GIs to identify those leaders´ faces. The War Department ran different types of non-military training courses to prepare American soldiers to operate and interact with European people during WWII. For example, there were open French courses for soldiers making them memorize basic phrases.