Emmanuel Goldstein helps the party because it is used as a propaganda tool to arouse emotion in citizens, as shown in option C.
Emmanuel Goldstein is presented as a traitor to the party, who wanted to fight it, was arrested, tortured, survived, and fled, creating the brotherhood, which is a group that wants to fight the party.
No one has ever seen Emmanuel Goldstein, but everyone has heard about him. This makes the reader suspicious that he does not exist, but it is an important entity for the brotherhood as it serves as propaganda to encourage members.
This question is about the book "1984" and you can find more information about this book at the link:
https://brainly.com/question/10334011