The answer is spontaneous recovery and weaker. Spontaneous recovery describes a learning and memory phenomenon where a previously extinguished conditioned response reappears after a delay, but it tends to be weaker if the original conditioned stimulus is introduced.
The accurate response is to allow the slave trade to continue for 20 additional years.
The countries mentioned are Japan, Germany, and Italy. In Franklin D. Roosevelt's significant address, "Fireside chat #19," delivered shortly after the Pearl Harbor attack, he elaborated on the diplomatic history between the United States and Japan, suggesting that Japanese negotiations were insincere and masked ulterior motives. This message greatly impacted the nation, serving as a warning of impending conflict. Roosevelt asserted that for American values to be preserved, the defeat of Germany, Japan, and Italy was essential.