I think it is a compound sentence or statement.
Answer:
The correct answer Low's style is formal; is he uses complex words that are appropriate for the ceremony, and his purpose is to inform his audience.
Explanation:
Seth Low was an American political figure. He was elected as Major of Brooklyn (1881-1885), and later served in the same position in New York City (1902-1903.) The Brooklyn Bridge was completed during his tenure as the major of that city, in 1883.
In the speech, Low's word selection is formal because of the ceremony and its magnitude; on the other hand, he wanted to inform his audience the purpose of the finished project. If he had used a more complex language or scientific facts, this goal might not have been reached. He did not choose informal words because of the context, so the last options are also incorrect.
The prepositional phrase is "on a high shelf" since ON is a preposition.
...Elaborate please? What story? If you tell me the name of the assignment I can probably get it for you.
The option that most effectively completes the sentence is “allowing world nations freedom of choice, within reason, promotes peace”. According to John Kennedy in his speech delivered at the American University, nations (in this case he refers to the Soviet Union) should not try to impose rules on other nations as this interferes with the process of peace and creates tension.