How does Senator Obama's choice to begin this speech with an
explanation of the background of his family members reflect the
purpose of his speech?

O It helps motivate listeners to pursue careers in politics or leadership
regardless of their heritage.
O It makes the audience sympathize with the hardships and challenges
faced by the speaker's family members.
O It makes the ideas of the quoted document even more relevant for
the listeners of the speaker's oration.
O It helps explain why it is unlikely for him to be on stage while also
connecting his presence to America's promise.