What kind of messaging would have likely been used during the times leading up to a possible German attack?

The correct answer reflects the importance of clarity and precision in communication during critical times leading up to a potential German attack. In military situations, especially during conflicts, it's essential for command structures to provide clear and precise instructions to troops in order to minimize confusion and ensure that everyone understands their roles and responsibilities. This type of messaging helps maintain order and preparedness, which is crucial in the face of impending danger.

Clear directions also facilitate effective coordination among different branches of the military and ensure that all personnel are aware of the necessary actions to take in response to threats. In contrast, the other types of messaging mentioned might lead to misunderstandings or a lack of readiness, which can be detrimental in a scenario where timely and correct actions are necessary for survival or success. Thus, the emphasis on precision in communication is paramount for effective military strategy leading up to an attack.