D: Before his European travel -- the highlight of his summer -- Mickey forced himself to pay off his credit cards.
Explanation:
The correct use of em dashes is shown in the sentence of the option D, which uses one of the functions of em dashes: the one of replacing commasfor an appositive phrase. In this case, "the highlight of his summer" is an appositive, and presents additional information about the noun "travel"; it could have been written with commas. But the em dashes are more emphatic.
Assonance is the repetition of vowel sounds in non-rhyming words, so the answer is C. "Desiring white camellias". (B doesn't work because it is only in one word).
Listening to someone's voice helps in understanding where certain words have emphasis. A recording/ live listening helps decipher what parts of the text have more importance in said passage.
