Final answer:
The most likely purpose for reading the Presidential Address to Congress of December 8, 1941 is to understand the events leading to World War II.
Step-by-step explanation:
The most likely purpose for reading the Presidential Address to Congress of December 8, 1941 is to understand the events leading to World War II. This speech, given by President Franklin D. Roosevelt, was delivered to address Japan's bombing of Pearl Harbor, which occurred a day earlier. The speech was designed to inform the nation about the attack and to persuade Congress to formally declare war against Japan.