Answer:
the error is in the incorrect usage of "quick."
Explanation:
In the sample sentence, the word quick is in the verb form when it should have the -ly ending to denote that it is an adverb. That is to say, since it is describing the verb "works" it should be the adverb "quickly" instead.
The fireside chats were a series of 30 evening radio addresses<span> given by U.S. President Franklin D.</span>Roosevelt<span> (known colloquially as "</span>FDR<span>") between 1933 and 1944. ..
</span>
The comma goes after the word remarkable and before the word unique
The comma after solely should be removed
