The "domino theory" during the post-world war ii era held that

the youth of the united states were quickly losing their moral foundation.
if one country were to fall to communist control, countries around it would soon fall.
once humans established a base on the moon, exploration of the planets would quickly follow.
if one southern state would repeal its segregation laws, states around it would soon do the same.

B) if one country were to fall to communist control, countries around it would soon fall.

Explanation:

The "Domino Theory" held that if one country were to fall to communist control, countries around it would soon fall. This led to the U.S. political and military philosophy of "containment" of communist to those countries already affected.

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explanation:

i think the fact that abraham lincoln was a tyrant

or probably like what the other person said from sitting in the chair to get assasinated xd

~batmans wife dun dun