The correct answer is the following: option D. Based on the excerpt provided in the question, the meaning of the word "indignation" is anger at an unreasonable act.
In the excerpt, President Franklin Delano Roosevelt expresses how neither him nor any other honest person would be able to suppress the sense of indignation at the treachery committed by the dictators of Japan. The use of the word "indignation" in the excerpt's concept helps the reader to understand that what Roosevelt means is that the American people will forever be angry at the seemingly unreasonable acts perpetuated by the Japanese army.
