I believe it is A. Sorry if I’m wrong about this. But usually terrorism involves pressuring others into the same beliefs.
Something that could be considered one of the first examples of a Red Scare is
<span>a. The actions towards socialist revolution by the NSC.
</span>
As @<span>Andriansp putted it,
"</span>Following the Russian revolution, United states undergone a massive worker's strike. Fearing the communist revolution, United states' attorney General allowed unwarranted arrest for those who is suspected as a communists"
b. is incorrect because that's referring to the space race and is irrelevant to this
c. is incorrect because Alger Hiss was convicted of being a soviet spy, not a communist
d. is incorrect because the IWW wanted to overthrow capitalism, which is the exact opposite of being afraid of communism almost
I hope this helps :)
Afro-centric Marxism https://imgur.com/St4SVVN
The Progressive Era was PRIMARILY concerned with making government responsible for the needs of the people. The correct option among all the options given in the question is option "a". This was the era when people with their movements were able to remove several corrupt government officials from their office and improve their lives.