The correcte answer is: "to emphasize the threat posed by Japan"
Rossevelt asked that it be a short speech that did not exceed five hundred words and focused on the essential message to reach as many Americans as possible: that the United States had been attacked by Japan by surprise and without a previous declaration of war and that the United States was willing to defeat him no matter what it cost.
To determine if someone talking is telling the truth, watch for body language. IF the person is fidgeting, keeps looking away, or stumbles upon their words, there is a high possibility they aren't telling the truth.
Ask yourself if what they are saying is possible or makes sense
Explanation:
"on" (and any subsequent words) was ignored because we limit queries to 32 words.