A sestina poem is a verse form in which the poem consists of six stanzas of six lines each, which are followed by a 3-line envoi. So that gives a total of 39 lines.
Question: A sestina poem contains a total of _____.
Answer: D. thirty-nine lines
Montag was afraid that Captain Beatty would discover the book he stole from the old lady
Ending the adjectives with -ed is not needed, so those answers are out. As for the numbers, the rule is usually that numbers one through nine are spelled out whereas number 10 and up are written in numbers. That said, you do not hyphenate the number with the word, so four-letter word would be correct.