Why do authors use red hereings?

the red herring device is especially common in mysteries, thrillers, and detective stories, where writers want to keep their reader guessing until the very end. ... Red herrings are the tricks that lead readers astray and thereby surprise them even more when something is revealed.

hello.  

answer ir: bush stirs up emotions of brotherhood and freedom to inspire americans.

however, you could u provide the whole options so as to verify : )

hope it .

i'm pretty sure i had this question the other day and b was the right answer.