Never divideA the last word on a pageB a word less than two syllablesC a contractionD all the above.

D: all the above

Explanation:

Following what the rules for word division recommend, we shouldn't divide: the last word on a page (this will make difficult for the reader); a word less than two syllables (we can't divide words that have only one syllable. Example: through)); a contraction (this is the case of a syllable that doesn't have a vowel, it's not possible to divide. Example: could - n't (wrong)