Paragraph Comprehension

In my book, The ASVAB Tutor’s Word Knowledge and Paragraph Comprehension Study Guide, I present the topic of author’s tone as one of the numerous types of questions that can appear on the Paragraph Comprehension section of the ASVAB.  Yesterday’s question addressed the topic of author’s tone.  The question asked which one was not a type of author’s tone?  Funny, angry, sarcastic, or fiction.  Do you know what the answer is?   The one that is not a type of author’s tone is fiction