The correct answer is C) to show that two or more ideas have the same level of importance.
King uses the rhetorical technique of parallel structure in his speech to show that two or more ideas have the same level of importance.
In his famous speech “I Have a Dream”, Martin Luther King Jr. uses the parallel structure as a rhetorical technique to repeat in different times one idea in order to convey it to the audience and make an emphasis of the importance of the idea at hand, trying to get it into the audience’s minds. Parallel structure repeats the same patterns of words or patterns of phrases in a sentence to highlight the idea.