The idea that the universe is expanding was discovered in the late 1920s by
a. russell.
b. doppler.
c. hertzsprung.
d. hubble.

the awenser wuold be slaves

where are the options?

explanation:

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.