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Both after the attack on Pearl Harbor, the U.S. entered World War II. After the attack on 9/11 a War on Terror was announced. Both attacks have this in common.
a. Both attacks were on American soil and caused public outrage.
b. Both attacks were on foreign soil and caused public outrage.
c. Both attacks involved hijacked planes, which destroyed buildings and lives.
d. Both attacks were directed against military targets, not civilian targets.
What is both attacks were on American soil and caused public outrage?