During the Cold War, Americans built bomb shelters as a result of increased fears of . A.
nuclear war
B.
a Soviet invasion
C.
terrorist attacks
D.
war with Vietnam

I think its either A OR C

Explanation:

The National Emergency Alarm Repeater (NEAR) program was developed in the United States in 1956 during the Cold War to supplement the existing siren warning systems and radio broadcasts in the event of a nuclear attack. The NEAR civilian alarm device was engineered and tested but the program was not viable and was terminated in 1967.

general allotment act (dawes act) february 8, 1887

amendment to the dawes act, february 28, 1891

commission to the five civilized tribes (dawes commission), march 3, 1893