Read the passage from "Barack Obama's Keynote Address: 2004 Democratic National Convention."

"If there's a child on the south side of Chicago who can't read, that matters to me, even if it's not my child. If there's a senior citizen somewhere who can't pay for her prescription and has to choose between medicine and the rent, that makes my life poorer, even if it's not my grandmother. If there's an Arab American family being rounded up without benefit of an attorney or due process, that threatens my civil liberties."

Which concept does Obama develop in this passage?

A. the responsibility of politicians to take care of the less fortunate
B. the hard times that all people experience in life
C. the goal of Americans to uphold the nation's values by looking beyond selfish interests
D. the need to recognize inequalities so that American life can improve

Barack Obama develops the concept of the responsibility of politicians to take care of the less fortunate in the passage by emphasizing the importance of addressing issues that affect individuals beyond one's immediate circle, such as children unable to read or senior citizens struggling to afford medication.

He highlights the interconnected nature of societal issues and how concerns for others, even if not personally related, are integral to building a stronger community and nation.

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