Which one of the following contains a list of innovations that resulted from the challenges posed by wwii?

After WWII, the world was left in a complete mess. Japan had it's nuclear devastation and Germany as well as England were in rubble. However, during the course of the war, there were many innovations in weaponry and protection. Also, improvements in field training.

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“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .