Answer:
B. higher than the frequencies of radio waves.
Answer:
Martin Luther King established authority and credibility of the claims in his "I Have a Dream" speech
Contrasting the United States Politics and rights established in its laws and how they were not executed with equality among its population.
Explanation:
First of all, Martin Luther King took as an example of the constitution, human rights, and many other structural laws that define the responsibilities of the government institutions to its citizens. Then, he showed how those laws and amendments weren't applied to minorities giving examples. He not only brought economic, or civil rights, he also brought education, behavior, and freedom of practice. After his speech that is considered one of the most influential speeches of all time society changed.
I would say A: impassioned because he's being optimistic in that sentence and does not acknowledge the down side of it all. It is not informal because nothing given in this sentence provides facts. I'm not particularly sure about it being ironic because I haven't read the book myself, I just know that the following sentence above does not fit B, C, or D.
