Why was the Zimmermann Telegram so concerning to the United States that it swayed public opinion fromneutrality toward intervention in World War I? A. In the telegram, Germany promised Mexico territory it lost in the U. S.-Mexican War if it pledged toside with Germany if the United States entered the war.

B. In the telegram between German officials, Germany detailed its plan to sink U. S. passenger ships inthe Atlantic if the United States did not remain neutral.

C. In the telegram between German officials, Germany detailed its plan to open a new front in the warby invading U. S. territories in the Caribbean.

D. In the telegram, Germany requested Japanese assistance in capturing the U. S. Territory of Hawaii inorder to diminish the U. S. presence in the Pacific.