More powerful air force radar and message decoding technologies.
The Germans made efforts to bomb Royal Air Force airfields and take out Britain's radar defense system, but the outnumbered RAF fighters managed to outmaneuver their opponents, aided by radar technology.
As for message decoding technologies, the code-cracking machine developed by Alan Turing had an impact particularly on naval battles in the Atlantic between the Germans and the Allies. Once they developed the ability to decode German messages, the British had to proceed carefully and not act on every military message or the Germans would have suspected their encoded messages were being hacked.
By learning trades and becoming economically independent
The answer is D. For example Canada is a socialist country.
The proposition that he suggested was that the states should unite into a single union. What inspired him to propose this was the idea on how the Iroquois nation united five different Native-American nations under a single banner into a single union. Nobody supported this but eventually they started supporting the idea.
D. providing a navy and military support
