Answer:
I think the correct answer is c
1. Russia secretly had maps so detailed of the Canadian Arctic during the Cold-War that other ships even now use them over official maps.
2. In the 1930’s starlet Hedy Lamarr invented a new technology to stop Nazi’s from jamming Navy torpedoes, but the idea was rejected until 1962 and implemented during the Cold War. Her frequency hopping technology is also the basis for modern Bluetooth.
3. During the Cold War, the USSR was able to tell a Soviet passport was a forged and fake because the staples in real passports would corrode due to the poor quality of metal.
I don’t know how to Splaine that for real though
