Final answer:
The correct sequence of events is: the sinking of the Lusitania, then the Zimmerman Telegram, followed by Congress declaring war, which is option A.
Step-by-step explanation:
The correct order of events leading up to the United States' entry into World War I, as presented in the student's question, is: Sinking of the Lusitania, Zimmerman Telegram, and Congress declares War. Therefore, the correct answer is A) Sinking of the Lusitania - Zimmerman Telegram - Congress declares War.
The RMS Lusitania was sunk by a German submarine on May 7, 1915, which killed 128 U.S. citizens and increased tensions between Germany and the United States. The tipping point occurred with the interception of the Zimmerman Telegram in January 1917, in which Germany proposed a military alliance with Mexico in the event of the U.S. entering the war on the side of the Allies. Finally, in response to continuing unrestricted submarine warfare by Germany and the public outcry following the Zimmerman Telegram, President Wilson asked Congress to declare war on Germany, which it did on April 4, 1917.