Answer:
Among the options given on the question the correct answer is option A.
The United States was in peace talks with Japan at that time.
Explanation: The question about the Japanese unexpected attack is about the Pearl Harbor attack. The Japanese air force attacked on Pearl Harbor On December 7,1941 in Honolulu, Hawaii. The attack eventually made USA engaged in the World War ll.
Although, the attack was unexpected from Japan. Because during that time, United States was in dialogue with Japan and negotiating about peace. Based US cease on oil shipment , Japan and USA started talk to end the sanction and make peace. President Roosevelt, Secretary of State Cordell Hull, Prime Minister Fumimaro Konoye and U.S. Ambassador to Japan Joseph Grew were on the verge of arranging a meeting in Alaska, but the parties could not come to an agreement on terms.
However, based on these peace talk USA did not expect the attack from Japan.
