Final answer:
The significance of the message sent by Zimmermann was indicated by the secure and indirect route chosen for its delivery, suggesting its importance.
Explanation:
The evidence from the excerpt suggests that the message Zimmermann sent was important because:
- Because the message was so important and needed to reach von Bernstorff, Zimmermann wanted the message to be carried across the ocean in a U-boat.
- The route the telegram was to take, first to Sweden and then to Washington, D.C., supports the idea that the contents of the message were important.
By choosing such a secure and indirect route for the message, Zimmermann indicated the importance and sensitivity of its contents, leading to the inference that the message was crucial.
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