Explanation:
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The correct answer is C. down the street.
As the name itself says, a prepositional phrase begins with a preposition. The only preposition in the sentence above is the word <em /><em>down, </em>which means that the following words are going to make a prepositional phrase with it. This prepositional phrase is telling us the location of the friend, where he or she lives.
The GCF of 28, 42, and 70 is 14.
