Which punctuation mark is used when spelling out compound numbers between 21 and 99?
a. dash
b. colon
c. period
d. hyphen

d. Hyphen

Explanation:

used to join words to indicate that they have a combined meaning or that they are linked in the grammar of a sentence

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )

this is what i put and it was correct

it's a way for authors to communicate with reader in this time period. books from the past can teach us about life.