А Why was the Zimmerman Telegram seen as a more urgent reason to enter World War I rather than Germany's use of unrestricted submarine warfare?
The Zimmerman Telegram threatened the American economy by proposing a joint German-Mexican trade embargo against the United States,
The Zimmerman Telegram involved plans for an attack on the United States itself while unrestricted submarine warfare targeted commercial shipping.
The Zimmerman Telegram indicated that Germany was planning to resume the use of unrestricted submarine warfare after promising to abandon it.
B
С
D
The Zimmerman Telegram contained a threat to assassinate President Wilson instead of only presenting a hazard to Americans who traveled abroad during the war.