The message sent by Arthur Zimmermann was deemed important due to the route it was planned to take and the significance attached to ensuring it reached its destination ambassador. The content aimed at influencing Mexico's involvement in the war further emphasizes its importance.
The evidence from the excerpt leads to the inference that the message Arthur Zimmermann sent was important because the route it was to take, first to Sweden and then to Washington, D.C., supports the idea that the contents of the message were important. Zimmermann's decision to send the message via a U-boat also indicates its significance as it was crucial for him to ensure it reached von Bernstorff. The nature of the message, aiming to convince Mexico to help Germany in the war, adds to the importance inferred from the excerpt.
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