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.
Answer:
An octave is a verse form consisting of eight lines of iambic pentameter (in English) or of hendecasyllables (in Italian).
Explanation:
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What is the poem in question?
A paragraph is a collection of sentences ranging from 3 upwards