The correct answer is B. Unsubstainted opinion
Step-by-step explanation:
A bandwagon appeal is a type of fallacy in which a speaker or writer asserts an idea or situation is true just because this idea is supported or believed by many people. This is considered as a fallacy because it is not proved many people support an idea and also even though a lot of people believe in one idea this does not make the idea truth. Because of this, including a bandwagon appeal in a persuasive speech or any other text or speech is mainly and unsubstantiated opinion, because this relies on personal perspective rather than on facts (opinion) and also this information has not been proved or corroborated (unsubstantiated).