Stalin attempted to eliminate all those he perceived as his enemies within the Soviet Union during the – a
Great Purge.
b
Black Death.
c
Russo-Japanese War.
d
Five-Year Plan.

the right answer is the constitution

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.