Had to look for the missing details of this question and here is my answer.
The main purpose of President Obama here in this section of this speech is to let the Americans be inspired in doing a collective work towards a better future and also for the future of the country as citizens of the United States. The answer for this would be the third option.
A, it blantently states a twist in the story from humor to horror.
Money isn’t going to bring happiness; money doesn’t solve everything; rich people have feelings; you can’t buy happiness etc...
