Personal narratives are most beneficial to value type of persuasive speech. Option B is correct.
Personal narrative (PN) is a prose narrative focusing on personal experience usually told in first person; its content is nontraditional. "Personal" makes reference to a story from one's life or experiences. "Nontraditional" refers to literature that does not fit the typical criteria of a narrative.
Value persuasive speech is a speech which focuses on whether or not something is right or wrong. It questions the moral or ethical aspect of an issue.
