Having found [it], we have used it. We used it against those who attacked us without warning at Pearl
Harbor, against those who have starved and beaten and executed American prisoners of war, against
those who have abandoned all pretext of obeying international laws of warfare. We have used it in
order to shorten the agony of war, in order to save the lives of thousands and thousands of young
Americans.
--Harry S. Truman
Use the passage below and your knowledge of social studies to answer the following question:
20. To what event(s) does the above excerpt refer?
A. use of radar, sonar, & heat-seeking missiles
B. slaughter of Fascist insurgents at Guernica
C. atomic bombings of Hiroshima & Nagasaki
D. indiscriminate attacks on German U-boats