The answer would be d because if the myths continue to be past down through generations and they are still told, they are popular!
An adverb could replace the italics.
In Sullivan Ballous letter it reveals his devotion to both the Union cause and his wife and family. Robert E. Lee reveals his views of succession and war at a time when he still hoped war could be prevented. I hope my answer has come to your help. God bless and have a nice day ahead!