Were the 1920s a decade of innovation or conservation

Innovation

Explanation:

The 20s was a decade of new inventions. It was the time directly after WWI, and when soldiers were eager to return to a more prosperous life.

i believe the answer is d.

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.