Answer: D.
reading stories of others who courageously faced frightening things
Explanation: well, within paragraph 13 Diaz brother was in remission from fighting leukemia , and reading a book from Robert cornier talking about facing their fears which gave him encouragement . However, with his brother recovering it gave him relief but in the stories it mentions "‘Do I dare disturb the universe?’’ before ultimately deciding that yes, they did dare. " the word they refers to more than one person or character facing their fears
