Answer:
b. encourage the audience to show its belief in America and what it could be.
Step-by-step explanation:
According to a different source, these are the options that come with this question:
a. use denotative language to establish emotional distance and show his reserve.
b. encourage the audience to show its belief in America and what it could be.
c. offer examples and details to give his audience concrete support for his argument.
d. leave the audience with a lasting impression of his authority and credibility.
In this text, then-Senator Obama talks about what he believes America to be. He reminds Americans of the importance of hoping for things that have not come yet, believing in a promising future and fighting when things are difficult. Obama wants all Americans to take part of this challenge and do their best for their country. The line mentioned in the question is meant to emphasize the importance of the participation of all people in this project. By using it, Obama encourages the audience to show that they believe in America and in what it could be.