According to grammar rules and most style books, you would hyphenate all compound numbers from twenty-one to ninety-nine. Therefore the correct answer is b, ninety-eight.
Periodically throughout recorded history, puzzling instances of psychiatric and neurologic symptoms have presented en mass<span>: outbursts of thrashing and screaming, or je rky spasms and abrupt vocal tics affecting a group of individuals at once and often attributed to causes like possession, witchcraft, and malingering. Such occurrences of so-called "mass hysteria" continue to confound the medical community, but growing experience has improved the understanding and approach to these seemingly contagious psychogenic events. </span>
"String-along songs about razor blade" were the author's narration of an advertisement on razor blades.
It’s C. Black English is a separate language, not a dialect of American English.
The first step in preparing your speech is to take a step back and try to look at it from the perspective of an audience member. See how they would perceive your speech - make sure it's understandable from their point of view and go from there.
