Obama's purpose in this section of the speech is to to inspire the American people to collectively work toward a better future, as explained below.
We call purpose the intention or objective behind a speaker's speech. In other words, the person giving a speech usually has a goal in mind, such as persuading or inspiring the audience to do something.
When it comes to former President Obama's speech, we can tell his purpose is to inspire people to work together toward a better future. This purpose is particularly revealed by the last sentence in the section, "we are made for this moment, and we will seize it -- so long as we seize it together."
With the information above in mind, we can choose option C as the correct answer.
The complete question with the excerpt and the answer choices can be found attached.
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