The correct answer is: “The people of the United States have already formed their opinions and well understand the implications to the very life and safety of our Nation.”
Bandwagon appeal is a persuasive technique that basically consists of making an argument that puts a sort of peer-presure on people, by making them believe they should accept or reject something just because most or all people do, "jumping on the bandwagon". It is common to see in political speeches.
In this request for a declaration of war, Roosevelt states that THE PEOPLE OF THE UNITED STATES have accepted his decision and, therefore, so should you.