Answer:
A) I mean, come on, these parents need to wise up and not be so stupid about the measles! Is the correct answer.
Explanation:
The tone in the first option would be the proper one if the conversation were taking place among friends because it uses informal expressions and words that shouldn't be used when discussing a topic such as disease. So, if the passage is formal, the others fit so A is correct.
Answer: I would contend that the right answer is actually the B) MacArthur wants to impress his listeners; Long wants to make them think.
Explanation: Just to elaborate a little on the answer, it can be added that the question is asking specifically for the purposes of their respective speeches. It is important to take into account that MacArthur's excerpt is part of an acceptance speech, whereas Long's excerpt is part of a radio address that the politician gave during the Great Depression. MacArthur is praising and commending the military for their work, using, for that purpose, a very poetic and symbolic language ("you are the leaven which binds together...," or "the shadows are lengthening for me. The twilight is here," just to give an example). His is clearly a speech aimed at impressing his listeners. Long, on the contrary, presents a series of facts and he then poses two very straightforward questions, which seem to be directed to those who were running the country at that time. He responds to the first one firmly, but he does not give an answer to the second one, since it is a rethorical question. His speech, therefore, definitely makes you think and reflect upon his words.
