Making a bandwagon appeal in a persuasive speech is an example of using is Unsubstainted opinion. Thus, option "B" is correct.
What is bandwagon appeal?
A bandwagon appeal is a kind of misconception in which a speaker or author asserts an idea or situation is accurate just because this theory is supported or believed by many individuals.
This is considered as a misconception because it is not ascertained many individuals who support an opinion and also even though a lot of individuals believe in one view this does not make the idea truth.
Because of this, including a bandwagon bait in a compelling speech or any other text or speech is mainly an unsubstantiated opinion, because this depends on personal perspective rather than on facts (opinion) and also this information has not been verified or corroborated (unsubstantiated).
Thus, option "B" is correct.
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