What are two of our defenses against nuclear attack? a: radar detectors b: sonar detectors C: missiles D : bombs

Its A and C

Explanation:

Sonar is only used in water, so it wouldn't work locating a nuclear war head in the sky. Bombs are dropped, and can't be used on targets above them. Missiles though are fired from ground and can be used on areal targets(such as a nuclear bomb.)

answer; passive listening;

answer; group think;