I believe that you have to have footnotes.
<u><em>Hello There!</em></u>
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<u><em>Let's first define what a prepositional phrase is. A prepositional phrase is a bunch of words and these words include a preposition and an object of the pronoun.</em></u>
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<u><em>In this case, the answer would be "D" because 'under' is a preposition so the prepositional phrase would be 'under bridges'</em></u>
C it makes the most sense